I've noticed a few recent changes, which are of course somewhat annoying.
1. Sometime overnight, my option "Disable Clientside Scripting Enhancements" got reset, so this morning, everything is popping up like crazy. It's all right now, but I had to remember which box I ticked some time ago.
2. Double clicking on a folder to mark that forum as read now causes a page refresh. Very annoying if you're trying to mark several forums as read in quick succession.
3. Having gotten used to the "Forum tools" at the top of the page just bringing up a menu, I now have to deal with a jump to the other end of the page. Is the top link actually worth anything any more?