Seriously, I can't be the only one who is experiencing this problem.
I found a CS5 service log but it's not that helpful. The time does match the most recent crash, though.
2010-08-06 10:59:53 : ERROR vcfoundation::io::VCEndOfFile: <End Of File>
2010-08-06 11:00:04 : ERROR vcfoundation::system::VCSysError: WriteFile() failed <232: The pipe is being closed.>
I have the same problem but it happens with Illustrator. Same symptoms and same error message.
I try to look everywhere and you are so far what I found.
I guess this is not common!
I am still doing my own research and I will update whatever I found out. If you have found something, please update.
It is probably common, but the crash happens without any kind of information that would lead to a solution, so nobody bothers to post about it (except me, I guess). I don't have any new information to provide. I went back to using Macromedia Fireworks 2004 for most work. Fewer features but much more stable. Software shouldn't get in the way but it often does. I wish the gov would have blocked the Macromedia/Adobe merger, we'd probably have much better software to use.