I was creating a game, and when I selected Spy vs Spy, the "Color" and "Game speed" options got a bit confused so that a label saying "Game Speed" was alongside a dropdown containing the color black as the choice.  The "Standard" game speed was not available when it happened.

This happened twice, but switching to a different map then back to Spy vs Spy fixed it.

Now that I think about it, this is probably another IE6 bug.

Yep IE6 isn't really supported - it's got so many quirks that need to be catered for that it's simply not worth the effort to patch the site up to get it working, sorry.