I've been experiencing IDE crashes at least once a week with v9.x; I've never had this happen before and I've been using it since v5. I have yet to discover any common themes to the crashes, it's just, one moment I'm editing, the next the window has closed and I've lost all my changes since the last auto-save.
It's the "lost all my changes" (and the "at least once a week") part that's really starting to wear homicidally-thin. I haven't sweared so much in years.
Additionally, for some reason the IDEA64.EXE that allows IntelliJ to work with the 64-bit JVM no longer works (IDE loads up, then hangs when indexing).
I've attached the thread dumps if it's any help.