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I actually hadn't realised that the main page showed the only votes of the first post and not a total tally of all the votes from the thread. I agree - it should represent the total tallies, or there should be a function to vote specifically for the thread itself (separate to the first post). Just to make a clear distinction about what you are voting for.
I also agree that you should return the 'created by' information to the thread list on the main page - mostly because I'm just used to it being there (Red Skies: Rappelz forum, Rappelz Forum, etc) and it currently feels like there is a lot of underutilised space that I've grown accustomed to being filled. Having both "created by" and "most recent post by" just feels normal, though I can survive without it.
All Games, Rappelz, Age of Conan - those bold headers in the categories navigation - I still feel that they should be linked to a list of only that category.
Alternately, add little checkboxes beside each group which affects the categories that are listed when you refresh. Though that miiight require some nasty self-made adjustments Vanilla 2's way of doing things. Just a thought.
All Games: General and Television should perhaps be slightly different shades of grey, and slightly different shades of green for Rappelz: General and Guides & Info. Maybe take the number of subcategories and tell it to reduce/increase RGB values by a certain amount for each additional subcategory in the list. I'd try it myself to see how it looked, if your CSS referenced General and Television as well as All Games :p Who knows how my attempts would turn out!
The old Red Skies Rappelz forum had an Information page, and I presume the other boards did too. I think this should return (either add it to the top nav, or above the Discussions nav). It could contain information about which games we "have a Red Skies" guild or clan in and which server and/or faction it is on in those games.
Maybe you could get really excited and allow each user to 'register' their account to each game, providing their username and perhaps class or rank for that game, perhaps alts as well. And a short description, like "Yeaaah, I haven't played this game in a long time... But if I'm available I'm happy to log in and buff you or answer questions you might have!". A copy of that info could go on each user page as well.
The Search function is still super-strict. A search for "screenie" will ignore results such as the "Sub's screenies" thread. I think it needs to be more lenient, will it let you make it search for LIKE %searchterm% ?