I think it's not very likely
Anyway, RejZoR, we have never been able to reproduce this behavior (and I tried, even with some files linked from the forum). Is it reproducible for you? What exactly does it mean "enormous memory usage" - are you referring to
Memory usage column from the Task Manager (which really may get bigger, but I don't think it should be such a problem), or rather
VM Size (that shouldn't get very big, unless the ISO is handled incorrectly)?