Would like mention that highlight used for selecting text when typing a reply (for when you need to copy/paste or mass delete) is nearly invisible and that making it a few shades darker (black or blue) would be much better. And the massive amount of gray (especially compared to the old forums' background) is rather dull.
I think the graphics look awesome on the site overall! But the problem I'm seeing doesn't occur until you get to the "... /TWITTER Users" part of the title ... the light blue sky on the background there between the chains makes it difficult to see the white text.
Is there a way to put a very, very narrow text box around the text title, but that would still allow for some transparency to see the graphic? Either that or maybe choose a different slice from the concept art that has more of the dark colors to place the white text for titles on? For example, maybe his arm span; or move the character towards the right more (in the slice)? I do like the slice you chose though; and I bet I know why. ^_^
Now for the changes made ...
I like the darker color behind the thread posts; it is easier to read.
I notice that the two smallest font sizes don't seem to be working for me (size 9 and 10).