I've got something sticking on the left control key, which is fine except - I never use the right one, even when I should. No, there couldn't be a correlation in there.
The what's new sometimes misses new posts that the icons show are there. It seems to be a timing issue, in that the posts were being created when I last asked for the list of new items, but the posts haven't actually been filed. Uh... example:
9:00:00 - Psi starts replying to a thread (#777)
9:00:01 - I get list of new posts
9:00:10 - Psi finishes and his reply is put onto the thread
9:15:01 - I come back and list new posts.
at that 9:15, the icon will have changed to show an unread post in a thread, since vBulletin knows that I haven't read post 777 of that thread. But "new posts" doesn't catch it, because I'd already listed post 777 in the earlier search, and it just happened to be null.