
For AI, I was thinking of looking at some of the Zerg AI BWAI has, and seeing if the author would be interested in having it featured in STF to provide more of a singleplayer challenge. If anyone has any recommendations, I'm all ears.
If you were attacking a Zerg Queen's Nest and selected it to see its health, that might have caused the crash. I've had a few cases where I'd be checking a building to see how well a unit was damaging it, and I think I tended to crash with the Queen's Nest. I still need to perform a conclusive test, however. If true, it'll be mighty weird, since the Nest shouldn't have been altered in any way (so likely culprit would be a FireGraft corruption).
As for the otherwise general stability, I'm glad to hear that. I'm pretty compulsive in checking my changes in small groups to quickly isolate and eliminate any bugs. It takes longer in the short term, but the end result is what you see.
I agree about the darkness of some of the buttons. I haven't done much work with palette editing, so I'll need to learn more when I redo the button icons.
Ah, I'm glad you noticed the hotkeys! Yes, I never liked Blizzard's style, and always thought a position-related system would work better. All you have to do is look at where the button is, and you'll be able to figure out its hotkey (not to mention your hand gets to stay in the same place). The only downside is whenever I move a button, I've got a little more work to do.
I look forward to any and all other feedback! Again, thank you!