IntelliJ freezes while running ANT and doing CVS diff at the same time

Hi -

I have a very large project that I often kickoff ANT builds from within IntelliJ. While the build is running, I sometimes do other analysis (e.g. cvs diff two versions of a file within IntelliJ). When I do any CVS related activity while the ANT build is running my IntelliJ freezes.

Has anyone else experienced this?

Thanks,

Justin