I find general browsing in the forums, especially in topics with multiple posts, is a lot harder. It's harder to distinguish posts because they are all white it seems.
Also, the very thin line between the content of the post, and the signiature from the poster, isn't helping either. So like Wizerzak said, maybe an alternating white and black background for the posts? And the difference between a person's sig and his post should be more obvious.
Or just like the old GBAtemp had, I don't know but I never had these kind of problems there.