Ahh, I thought that might be the case so I downloaded what appeared on the /download/ page last night. But I wasn't sure if that was the right revision number so I thought I'd wait to post any feedback until I was sure.
Well, Matt, as I mentioned to you in PM before, I'm trying to run this on Vista with a laptop at the moment (but will be on my regular XP machine in a few weeks). GTKRadiant crashes unless I run it in 256 colors (random internet posts suggest it's a driver issue, which makes sense since this is just a Dell laptop with no special gaming capabilities).
UFORadiant does significantly better. No crashing, but the viewports don't seem to work. The ones on the right see through the program to whatever is behind the window. The one on the left gives a top-down view, but the viewport jumps to the top left of the screen. You can see the attached image below.
As I mentioned, I'll be off of this system in just a few weeks, so don't go out of your way working on a fix just for me. But I thought if you wanted to work towards Vista support I'd let you know what I was getting. Personally I hope I never have to use Vista.