[.24 Lockup] Serious hang

I'd had crashes on .23, but nothing this bad.  I was trying to move my sovereign, hit the space bar for next turn, a message box popped up with no message but asking me for a yes/no response.  I clicked yes, and the game screen went black.  After waiting 30 minutes for it to terminate, I tried to use task manager to kill it, but it wouldn't die.  I finally was able to reboot, but the shutdown took another 20 minutes and when Vista came back up it said Windows hadn't shut down cleanly.

debug.err is here.

I looked for a memory dump to submit to fogbugz, but there wasn't one in the directory where I'd found them before.

dxdiag is here.