Build 9732, Win xp, around 150 MB heap JVM memory left for idea (enough)
IDEA now automatically imports maven projects (oh, why, why?), which is usable only for smallish ones. With 100 modules it's a real drag (and one can't kill this process, only disable the option for next time).
Anyway, if there is *at least one* maven project imported (available in the Maven sidebar), it kills the performance of Project Structure dialog (just open -> click Cancel). My project is opened as IDEA project, not Maven one.
Filename with a snapshot is 9732_andrew_14.02.2009_13.08.27_with_maven_module.zip
The only fix is to remove *every* maven project IDEA imported, which kinda negates the whole idea of maven integration.