abrt 1.1.1 detected a crash.
Attached file: backtrace
reason: Process /usr/bin/nm-connection-editor was killed by signal 11 (SIGSEGV)
release: Fedora release 12 (Constantine)
Created attachment 421311 [details]
Hmm, not enough debuginfo here to figure out what's going wrong. But you might try updating to a newer version of NetworkManager to see if that fixes the problem.