Almost the same bug: I get the same exact URL (to an uploaded file in this case) in single post and in topic details, but only the single post link works. Clicking the topic details link gives me:
The page you requested doesn’t exist or is private.
Here’s the weird part though:
select failed download URL in browser location bar
This is the same error with clicking a link to /raw/ - Ember tries to route to it, finds no route, gives 404 page even though the server would reply if you asked it.