Over the past few days, I've been making changes to the forum. Here's a basic list of everything.
I have added a theme switcher that works signed out, so anyone who needs the Legacy theme to browse the forum in a not half broken state can quickly switch to it. Or it can be used as a quick way to try out the various themes the board has.
I have added a OS profile field, you can put whatever OS you want, anything from Windows 7 x64, to Linux Mint, to Microsoft Neptune, to SerenityOS, and so on.
Profiles are much simpler now, no editing your pic into a frame, just upload it.
Users without an avatar have a default avatar now.
Users who set a birthday should have a birthday cake in their profile area when it's their birthday.
I think that's all unless I forgot something I did (which is very likely). I still have to update the themes at some point, and maybe I'll try moving the style box and the Smartfeed button to the footer.