Looks like the memory is still a problem with OS X.

Running jum353 over for a day eventually ate up 2 GB of hard drive space, resulting in a "out of disk space error", and eventually a java crash sent to Apple. "Exception: EXC_BREAKPOINT (0x0006) "

I've saved the bug report if anyone wants it, and did manage to grab a screenshot of memory activity a few minutes before the crash

(Running as UP, about ~.5GB downloaded, ~2 GB uploaded)

[edit--overly large screenshot removed]