I think the biggest issue is too much white space.
The right side bar needs to be re-thought, It is too short (shallow) so once you scroll down a very large chunk of the screen is white space.
This is an odd font (size choice). It is hard to read. It is either too big or too small.
I guess I really liked the old format. I use a few different help boards (pentaho, linux, macosxhints) and I always thought the apple community discussions was one of the best. It had a very tight layout. Lots of information on the screen and not cluttered or busy.
Not true now.
Whats up with the balloon framing postings? Complete waste of space.