After giving the new forums a good run I have the following remarks:
Often when I open a new page and scroll down I get a blurred image where it seems like one horizontal line on the screen is just repeated forever until the image suddently snaps back.
Sometimes when I reply to a post I get this weird phenomenon where I can type, but for every keystroke the area where I'm typing in "jumps to the top" so that I can't see the bottom of where I'm typing.
The "jump to" bar seems a little funny to me: When I click on let's say "basement" the bar changes shape, streching across the entire screen, almost - and I have to select where I want to go to again.