On my new site I tried to mention the #staff category, which is a preseeded category on new installs. Weirdly, even though in the preview it looks correct when I save the post it instead shows up as #c which then doesn’t work. Can someone with the correct privs try to replicate this on try?
Why would this be specific to that category? Just try it with any category, the code is the same. If you can’t repro on try with any category..
Are you trying to mention a private category in a public topic?
「いいね！」 2
テスト環境（5120dcfb3d9682743e93927a5a90ab6dc1aab8b8）でこれを試しています。
プレビューは完璧に動作します：
投稿しようとしたテキストは以下の通りです：
So #contribute:site-feedback は公開、#uncategorized はかなり特別、#lounge は保護済み、そして #staff は本当に非公開です！
これを投稿すると実際に内部サーバーエラーが発生しました – ログエントリはこちら：
以前のバージョンでは、未分類の投稿で公開カテゴリを参照する際にも #c が表示されていました。
「いいね！」 1
ここで試してみる：
つまり #meta は公開、Uncategorized はかなり特別、#lounge は保護済み、#staff は超秘密ってことか！
これでうまくいった。#staff はプレビューでは太字ではなかったが、最終投稿では太字になっている。
Sorry for my silence - you guys are too responsive! 
For me this started with issues with a new install on digital ocean. I am suspecting I need to update the server and then rebuild my docker install. Also, it is quite possible I brought this on myself by ignoring the warnings and insisting on using the smaller 500mb droplet. I upgraded my DO droplet to 1gb after the fact. This is just a small throw away demo site I was hoping to not spend any real money on.
That said, here’s the logs I am getting right now in case it’s of interest to others. Mentioning any categories no longer works and does not allow me to save changes to posts. It looks fine in composer and preview, but fails to save with “500 Internal Server Error”.
The error in the log looks pretty similar to what @fefrei sees.
Message (3 copies reported)
PrettyText::JavaScriptError (PrettyText::JavaScriptError)
/var/www/discourse/lib/pretty_text.rb:53:in `category_hashtag_lookup'
Backtrace
/var/www/discourse/lib/pretty_text.rb:53:in `category_hashtag_lookup'
at opts.categoryHashtagLookup (<eval>:1:60)
at Discourse.Dialect.inlineRegexp.emitter (/var/www/discourse/app/assets/javascripts/discourse/dialects/category_hashtag_dialect.js:15:43)
at /var/www/discourse/app/assets/javascripts/discourse/dialects/dialect.js:389:35
at oneElement (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:1200:45)
at inline (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:1233:52)
at d.__call__ (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:363:19)
at d.__call__ (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:365:19)
at processInline (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:261:41)
at para (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:1173:40)
at processBlock (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:246:31)
at toTree (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:281:22)
at Markdown.parse (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:174:15)
at toHTMLTree (/var/www/discourse/vendor/assets/javascripts/better_markdown.js:421:20)
at Discourse.Dialect.cook (/var/www/discourse/app/assets/javascripts/discourse/dialects/dialect.js:283:23)
at makeHtml (/var/www/discourse/app/assets/javascripts/discourse/lib/markdown.js:228:34)
at <eval>:1:44
/var/www/discourse/lib/pretty_text.rb:222:in `block in markdown'
/var/www/discourse/lib/pretty_text.rb:415:in `block in protect'
/var/www/discourse/lib/pretty_text.rb:413:in `synchronize'
/var/www/discourse/lib/pretty_text.rb:413:in `protect'
/var/www/discourse/lib/pretty_text.rb:192:in `markdown'
/var/www/discourse/lib/pretty_text.rb:267:in `cook'
/var/www/discourse/plugins/poll/plugin.rb:140:in `extract'
/var/www/discourse/plugins/poll/plugin.rb:239:in `block (2 levels) in activate!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:432:in `block in make_lambda'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:182:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:182:in `block in conditional'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:504:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:504:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:504:in `each'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:504:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:778:in `_run_validate_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activemodel-4.2.5.1/lib/active_model/validations.rb:399:in `run_validations!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activemodel-4.2.5.1/lib/active_model/validations/callbacks.rb:113:in `block in run_validations!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:778:in `_run_validation_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activemodel-4.2.5.1/lib/active_model/validations/callbacks.rb:113:in `run_validations!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activemodel-4.2.5.1/lib/active_model/validations.rb:338:in `valid?'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/validations.rb:58:in `valid?'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/validations.rb:83:in `perform_validations'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/validations.rb:37:in `save'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/attribute_methods/dirty.rb:21:in `save'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:286:in `block (2 levels) in save'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:351:in `block in with_transaction_returning_status'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/database_statements.rb:211:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:220:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:348:in `with_transaction_returning_status'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:286:in `block in save'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:301:in `rollback_active_record_state!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:285:in `save'
/var/www/discourse/lib/post_creator.rb:347:in `save_post'
/var/www/discourse/lib/post_creator.rb:127:in `block in create'
/var/www/discourse/lib/post_creator.rb:227:in `call'
/var/www/discourse/lib/post_creator.rb:227:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/transaction.rb:184:in `within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/transactions.rb:220:in `transaction'
/var/www/discourse/lib/post_creator.rb:225:in `transaction'
/var/www/discourse/lib/post_creator.rb:124:in `create'
/var/www/discourse/lib/new_post_manager.rb:148:in `perform_create_post'
/var/www/discourse/lib/new_post_manager.rb:122:in `perform'
/var/www/discourse/app/controllers/posts_controller.rb:113:in `create'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/abstract_controller/base.rb:198:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/rendering.rb:10:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:117:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:117:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:505:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:505:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:81:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/abstract_controller/callbacks.rb:19:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/rescue.rb:29:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/notifications.rb:164:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/notifications.rb:164:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/abstract_controller/base.rb:137:in `process'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionview-4.2.5.1/lib/action_view/rendering.rb:30:in `process'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-mini-profiler-0.9.8/lib/mini_profiler/profiling_methods.rb:106:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal.rb:196:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_controller/metal.rb:237:in `block in action'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:74:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:43:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/journey/router.rb:43:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/journey/router.rb:30:in `each'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/journey/router.rb:30:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:815:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-protection-1.5.3/lib/rack/protection/frame_options.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/omniauth-1.3.1/lib/omniauth/builder.rb:63:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/conditionalget.rb:38:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/head.rb:13:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:129:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/flash.rb:260:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:225:in `context'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:220:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/cookies.rb:560:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/query_cache.rb:36:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.5.1/lib/active_support/callbacks.rb:81:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/logster-1.0.1/lib/logster/middleware/reporter.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5.1/lib/rails/rack/logger.rb:38:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5.1/lib/rails/rack/logger.rb:22:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:10:in `call_with_quiet_assets'
/var/www/discourse/config/initializers/100-silence_logger.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/request_id.rb:21:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/methodoverride.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/runtime.rb:18:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/sendfile.rb:113:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-mini-profiler-0.9.8/lib/mini_profiler/profiler.rb:282:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/message_bus-2.0.0.beta.2/lib/message_bus/rack/middleware.rb:60:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:73:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5.1/lib/rails/engine.rb:518:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5.1/lib/rails/application.rb:165:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5.1/lib/rails/railtie.rb:194:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5.1/lib/rails/railtie.rb:194:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/urlmap.rb:66:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `each'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `call'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/unicorn-5.0.1/lib/unicorn/http_server.rb:562:in `process_client'
/var/www/discourse/lib/scheduler/defer.rb:85:in `process_client'
/var/www/discourse/lib/middleware/unicorn_oobgc.rb:95:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/unicorn-5.0.1/lib/unicorn/http_server.rb:658:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/unicorn-5.0.1/lib/unicorn/http_server.rb:508:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/unicorn-5.0.1/lib/unicorn/http_server.rb:132:in `start'
/var/www/discourse/vendor/bundle/ruby/2.0.0/gems/unicorn-5.0.1/bin/unicorn:126:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.0.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.0.0/bin/unicorn:23:in `<main>'
Env
hostname odyssey.saidia.org-app
process_id [4342, 116, 125]
application_version 91bb38626ce5d7023113a9b010dc8cc4c591248e
HTTP_HOST odyssey.saidia.org
REQUEST_URI /posts
REQUEST_METHOD POST
HTTP_USER_AGENT Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.103 Safari/537.36
HTTP_ACCEPT application/json, text/javascript, */*; q=0.01
HTTP_REFERER http://odyssey.saidia.org/
HTTP_X_FORWARDED_FOR 73.35.188.188
HTTP_X_REAL_IP 73.35.188.188
username tobiaseigen
params
raw [Welcome to Odyssey Community — thanks for starting a new conversation! Does the title sound interest, I am testing out. #contribute:site-feedback will it work? ]
title [testing no it's not a good summary because i am just testing, this is a test of mentioning categories ]
category
is_warning false
archetype regular
typing_duration_msecs [8600, 4800]
composer_open_duration_msecs [36814, 24713, 35702]
nested_post true
「いいね！」 3
OK, FWIW I updated my droplet and rebuilt discourse, and now category mentioning is back. I don’t know if it was my updates or just updating to the latest v1.5.0.beta10 +74 build that fixed it, but it’s fixed. 
Update:
Why should this throw an error or change it to #c?
Anyway, moving along. I think the first time I tried this I got different behavior for #staff vs e.g. Uncategorized but then later on it got worse and I started seeing error messages and unable to save my post at all.
Thankfully it seems to have resolved itself.
「いいね！」 3
Thanks for fixing @zogstrip
https://github.com/discourse/discourse/commit/3bf931ce5481963f3eff81c91e263894f15bb42f
「いいね！」 3