On a couple of occasions now I've been typing a Java comment (// variety) and IDEA X just "goes away". The mouse is fine, no spinning beach ball (I'm using OS X) but the app stops responding to any input with the exception of the "IntelliJ IDEA" menu. But, if I select "Quit" nothing happens. At one time the app's state (in top) was "stuck" but other times it is just switching between running and sleeping, using very little CPU and a few faults. I've let it sit for 30min--no change. I don't want to file this as a bug until some other folks confirm that they have seen this.
IdeaX-IU-98.402 and .382
OS X Snow Leopard 10.6.4
2009 MacBook Pro, plenty of RAM and disk space
-Xms450m -Xmx650m, other parameters the defaults
It seems that the problem occurs within the first 10 characters of the comment text; again, using the "//" form of comment.