let's list thread's forum on subscribed threads page
 

For the user's subscribed threads page, how about identifying the thread's forum (in a link) next to each thread listed? There's plenty of blank gray space to the right of the thread's name. Even if the user doesn't want or need the subscribed threads screen to remind him/her what forum each thread is posted in, linking to each thread's forum would provide shortcuts to forums that the user probably visits frequently. This would be useful if you have the subscribed threads page bookmarked as your usual entryway into LQ.

I think this suggestion is worth considering.