We're getting bugs/suggestions posted to a number of different threads so I'll start this one and close the others.
Post here all feedback you want about the new forums, what's not working like the old ones, what seems completely broken, what you'd like to see changed or whatever, if you can keep to some kind of easy to read format that'd be great but I won't force you, ideally something like:
Usability: not enough characters available for signatures
Usability: cannot search for 3 letter things like PBO/WGL
Those two I already fixed this morning.