MORE WORK IS NEEDED
Just off the top of my head:
I reiterate the earlier poster's comment about not using my full screen width. Over half my screen is just the background picture.
Download history should at least list the game it was for with all the other information.
Search by category shouldn't be a refinement of a completed search, it should be a main type.
On individual mod screens, the user last downloaded date info should be right next to the last uploaded info.
I mention all this here because I'm not sure where would be more appropriate.