I too think that the stark white and strong colors are too jarring on the eyes, but I have a bigger problem.
On two separate computers on two separate networks (work and home) both running Firefox, I consistently have the following problems on multiple attempts:
1) Even if I login and check the "stay logged in" box, often it doesn't logged in
2) When I click the "New Posts", I get 100+ pages
3) If I scroll through those "New Posts", they are wildly out of chronological order and of course contain many entries that aren't new at all
4) Clicking the "Mark All As Read" doesn't do anything, a click seconds later on "New Posts" again yields 100 pages of threads.
5) Often the same thread text appears on multiple thread titles
6) Members' locations no longer appears next to their name and avatar; this makes it hard to decide if its worth investigating items for sale--readers can't tell if someone is local or hundreds of miles away.
Those are the problems, and currently the site is near unusable. It took me 15 minutes to find this thread to post my comments (hopefully helpful).