Just tried to change my project's revision number by clicking Build/Version from the PM. Got a message telling me there was "not enough memory to complete this operation". After a bit of trial and error I discovered that I could bring up the version screen if I paused Foxtabs first.
Don't know if this is a bug or a feature but thought I'd let folks know about it. Certainly it's easy enough to work around once you know what to do.
--stein