Application that crashed: kmail
Version of the application: 1.12.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.9-174.fc12.x86_64 x86_64
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
Was syncing to gmail dimap.  Started syncing to my local dimap, after I had re-set the local dimap turning off the periodic update.  It started updating the local dimap continuously!  I used File/quit, and got a crash.

 -- Backtrace:
Application: KMail (kmail), signal: Aborted
[KCrash Handler]
#5  0x0000003fdc6326c5 in raise () from /lib64/libc.so.6
#6  0x0000003fdc633ea5 in abort () from /lib64/libc.so.6
#7  0x0000003fdc66f0f3 in __libc_message () from /lib64/libc.so.6
#8  0x0000003fdc674a76 in malloc_printerr () from /lib64/libc.so.6
#9  0x0000003fe721d8d7 in QDBusConnectionPrivate::~QDBusConnectionPrivate (this=0x1437960, __in_chrg=<value optimized out>) at qdbusintegrator.cpp:958
#10 0x0000003fe7215500 in ~QDBusDefaultConnection (this=0x3fe746c9a8, __in_chrg=<value optimized out>) at qdbusconnection.cpp:957
#11 QGlobalStaticDeleter<QDBusDefaultConnection>::~QGlobalStaticDeleter (this=0x3fe746c9a8, __in_chrg=<value optimized out>) at ../../src/corelib/global/qglobal.h:1637
#12 0x0000003fdc635b82 in exit () from /lib64/libc.so.6
#13 0x0000003fdc61eb24 in __libc_start_main () from /lib64/libc.so.6
#14 0x0000000000402249 in _start ()

Reported using DrKonqi