No clue what caused the crash, I left my computer downloading some files this morning, just connected to see how it was doing and Transmission was already closed.
4/27/10 7:02:55 AM [0x0-0x17017].org.m0k.transmission[222] Assertion failed: (io->socket >= 0), function event_enable, file /Users/sheila/transmission/trunk/libtransmission/peer-io.c, line 464.
4/27/10 7:03:03 AM ReportCrash[339] Saved crash report for Transmission[222] version 1.92+ (10531) to /Users/USER/Library/Logs/DiagnosticReports/Transmission_2010-04-27-070303_COMPUTER.crash
4/27/10 7:03:12 AM com.apple.launchd.peruser.501[172] ([0x0-0x17017].org.m0k.transmission[222]) Job appears to have crashed: Abort trap
4/27/10 8:26:27 AM [0x0-0x30030].org.m0k.transmission[399] [08:26:27.270] Starting libevent thread
Using latest r10531 (from xpjets). Posting this in trac as well.