This has probably already come up before but I did a quick search and didn't see anything. My search-fu is kind of lame; my apologies if I've missed it.
I currently have 400 some-odd comments to moderate, but when I go to /blog/wp-admin/moderation.php I get a blank page.
The only plugin I have activated (or even installed) is Akismet. /blog/wp-admin/edit-comments.php?page=akismet-admin works fine.