When a user (with the ability to edit) (via
min trust to edit post) deletes a topic they created, the background turns red (the
deleted class gets added to
div.topic-post) and the text becomes “(topic withdrawn by author)” but the topic is still open.
This becomes a problem if, after deleting, the user edits the contents of the first post in the topic:
when they hit save, the red background disappears (no
deleted class) but the topic gets closed (if you check the wrench, you’ll see the option to “Open” the topic even though it doesn’t appear to be closed).
This means that other users won’t be able to reply to it and admins won’t see any problem because it looks like a regular topic.
Although, now that I think of it, the problem might be that users with edit privileges should not be able to edit their deleted posts (without undeleting first). This is what happens with admins: they get “Invalid access” when they try to edit a deleted post.