Not really a bug, but thought I mention it. The front page is wider than the rest of the pages. No wonder, three columns vs. one. It's also no issue on my 1920x1200 desktop, but on my 1024x600 netbook it's too wide, and I have to horizontally scroll over to get to my watched threads. A (probably) simple solution would be to be able to swap the already movable sidebars left and right - not just up and down, as it currently is possible.
Also, I'd love a feature to auto-watch/subscribe to threads I posted in. Not sure if that's been mentioned already, but I guess that would be nice to have.