Version:           unknown (using 4.2.00 (KDE 4.2.0), Debian packages)
Compiler:          cc
OS:                Linux (x86_64) release 2.6.26-1-amd64

i launched kfind from Dolphin's menu while at some Tab.
kfind worked ok (returned some good results) i copied some of the items
to some other open Tab in Dolphin.  (copy&paste)
closed the original tab (from which the kfind session was launched) 
an after awhile (working with other applications) i saw kfind is still open on the task bar
and i tried to close it and it crashed.

see crash report:

Application: KFind (kfind), signal SIGABRT
0x00007f89fe780b20 in __nanosleep_nocancel () from /lib/libc.so.6
[Current thread is 1 (Thread 0x7f8a01535700 (LWP 8468))]

Thread 1 (Thread 0x7f8a01535700 (LWP 8468)):
[KCrash Handler]
#5  0x00007f89fe714105 in raise () from /lib/libc.so.6
#6  0x00007f89fe715623 in abort () from /lib/libc.so.6
#7  0x00007f89fe7544a0 in malloc_printerr () from /lib/libc.so.6
#8  0x00007f89fef1c9fd in ~QMimeSourceWrapper (this=0x25f82b0) at kernel/qclipboard_p.h:122
#9  0x00007f89fef7e17a in cleanupClipboardData () at kernel/qclipboard_x11.cpp:185
#10 0x00007f89ff9e7945 in qt_call_post_routines () at kernel/qcoreapplication.cpp:159
#11 0x00007f89fef151a8 in ~QApplication (this=0x7fff0966e910) at kernel/qapplication.cpp:938
#12 0x000000000041ae04 in main (argc=2, argv=0x7fff0966ef88) at ../../../apps/kfind/main.cpp:56