Application: konversation (1.2-alpha6)
KDE Version: 4.3.64 (KDE 4.3.64 (KDE 4.4 >= 20090812)) "release 2"
Qt Version: 4.5.2
Operating System: Linux 2.6.27.29-0.1-default x86_64
Distribution: "openSUSE 11.1 (x86_64)"

What I was doing when the application crashed:
I edited some settings in the Konversation settings, then exited the IRC chat and it crashed.

 -- Backtrace:
Application: Konversation (konversation), signal: Aborted
[KCrash Handler]
#5  0x00007f8bf195d645 in raise () from /lib64/libc.so.6
#6  0x00007f8bf195ec33 in abort () from /lib64/libc.so.6
#7  0x00007f8bf3225f15 in qt_message_output(QtMsgType, char const*) () from /usr/lib64/libQtCore.so.4
#8  0x00007f8bf322605b in qFatal(char const*, ...) () from /usr/lib64/libQtCore.so.4
#9  0x00007f8bf3951e9c in KDebug::hasNullOutput (type=QtDebugMsg, area=7001) at /usr/src/debug/kdelibs-4.3.64svn1010339/kdecore/io/kdebug.cpp:622
#10 0x00007f8bf6a7c999 in KDirWatchPrivate::removeEntry (this=0x9e5900, instance=0x12e9650, e=0x12e9af8, sub_entry=<value optimized out>)
    at /usr/src/debug/kdelibs-4.3.64svn1010339/kio/kio/kdirwatch.cpp:903
#11 0x00007f8bf6a7c392 in KDirWatchPrivate::removeEntry (this=0x9e5900, instance=0x12e9650, _path=@0x12dea38, sub_entry=0x0) at /usr/src/debug/kdelibs-4.3.64svn1010339/kio/kio/kdirwatch.cpp:860
#12 0x00007f8bf6a7e16e in KDirWatchPrivate::removeEntries (this=0x9e5900, instance=0x12e9650) at /usr/src/debug/kdelibs-4.3.64svn1010339/kio/kio/kdirwatch.cpp:962
#13 0x00007f8bf6a7e34e in ~KDirWatch (this=0x12e9650) at /usr/src/debug/kdelibs-4.3.64svn1010339/kio/kio/kdirwatch.cpp:1632
#14 0x00007f8bf6b17929 in ~KBookmarkManager (this=0x12e0430) at /usr/src/debug/kdelibs-4.3.64svn1010339/kio/bookmarks/kbookmarkmanager.cc:124
#15 0x00007f8bf6b1644e in destroy () at /usr/include/QtCore/qalgorithms.h:350
#16 0x00007f8bf19602ed in exit () from /lib64/libc.so.6
#17 0x00007f8bf194958d in __libc_start_main () from /lib64/libc.so.6
#18 0x000000000043ef89 in _start ()

Reported using DrKonqi