Application: kontact (4.7.2)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
Kontact often (vut not always) crashes When I hit "Save As" on an attachment. A backtrace of such an occasion follows.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f3de15c07a0 (LWP 2288))]

Thread 5 (Thread 0x7f3dc753b700 (LWP 2289)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f3ddde13c2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f3ddde13d59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f3dd9212efc in start_thread (arg=0x7f3dc753b700) at pthread_create.c:304
#4  0x00007f3ddeb2189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f3dc6d32700 (LWP 2290)):
#0  0x00007f3ddeb15773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f3dd8744f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3dd8745429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3ddff5cf3e in QEventDispatcherGlib::processEvents (this=0x1fd2ca0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f3ddff30cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f3ddff30ef7 in QEventLoop::exec (this=0x7f3dc6d31de0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f3ddfe4827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f3ddfe4ad05 in QThreadPrivate::start (arg=0x1fd23b0) at thread/qthread_unix.cpp:331
#8  0x00007f3dd9212efc in start_thread (arg=0x7f3dc6d32700) at pthread_create.c:304
#9  0x00007f3ddeb2189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f3d77d92700 (LWP 2302)):
#0  0x00007f3ddeb15773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f3dd8744f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3dd8745429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3ddff5cf3e in QEventDispatcherGlib::processEvents (this=0x266efc0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f3ddff30cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f3ddff30ef7 in QEventLoop::exec (this=0x7f3d77d91db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f3ddfe4827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f3ddff13cbf in QInotifyFileSystemWatcherEngine::run (this=0x28c5e00) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f3ddfe4ad05 in QThreadPrivate::start (arg=0x28c5e00) at thread/qthread_unix.cpp:331
#9  0x00007f3dd9212efc in start_thread (arg=0x7f3d77d92700) at pthread_create.c:304
#10 0x00007f3ddeb2189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f3d741cb700 (LWP 3680)):
#0  0x00007f3ddeb15773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f3dd8744f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3dd8745429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3ddff5cf3e in QEventDispatcherGlib::processEvents (this=0xa93a750, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f3ddff30cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f3ddff30ef7 in QEventLoop::exec (this=0x7f3d741cadb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f3ddfe4827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f3ddff13cbf in QInotifyFileSystemWatcherEngine::run (this=0x12800c70) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f3ddfe4ad05 in QThreadPrivate::start (arg=0x12800c70) at thread/qthread_unix.cpp:331
#9  0x00007f3dd9212efc in start_thread (arg=0x7f3d741cb700) at pthread_create.c:304
#10 0x00007f3ddeb2189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3de15c07a0 (LWP 2288)):
[KCrash Handler]
#6  0x00007f3dd5e0e2c2 in length (this=0x30) at /usr/include/qt4/QtCore/qbytearray.h:338
#7  KMime::Content::decodedContent (this=0x79cfe90) at ../../kmime/kmime_content.cpp:356
#8  0x00007f3d7cc1edbb in MessageViewer::Util::saveContent (parent=0x26709f0, content=<optimized out>, url=...) at ../../messageviewer/util.cpp:340
#9  0x00007f3d7cc20c14 in MessageViewer::Util::saveContents (parent=0x26709f0, contents=...) at ../../messageviewer/util.cpp:268
#10 0x00007f3d7cc38874 in MessageViewer::ViewerPrivate::openAttachment (this=0x26d3c90, node=0x79cfe90, name=<optimized out>) at ../../messageviewer/viewer_p.cpp:358
#11 0x00007f3d7cc171dd in (anonymous namespace)::AttachmentURLHandler::handleClick (this=<optimized out>, url=<optimized out>, w=0x26d3c90) at ../../messageviewer/urlhandlermanager.cpp:781
#12 0x00007f3d7cc1c0d5 in MessageViewer::URLHandlerManager::handleClick (this=0xa991a20, url=..., w=0x26d3c90) at ../../messageviewer/urlhandlermanager.cpp:369
#13 0x00007f3d7cc2c7f3 in MessageViewer::ViewerPrivate::slotUrlOpen (this=0x26d3c90, url=<optimized out>) at ../../messageviewer/viewer_p.cpp:1790
#14 0x00007f3d7cc3d0f1 in MessageViewer::ViewerPrivate::qt_metacall (this=0x26d3c90, _c=QMetaObject::InvokeMetaMethod, _id=19, _a=0x127e3f20) at ./viewer_p.moc:212
#15 0x00007f3ddff48a5e in QObject::event (this=0x26d3c90, e=<optimized out>) at kernel/qobject.cpp:1217
#16 0x00007f3ddf2e2424 in notify_helper (e=0x127d3960, receiver=0x26d3c90, this=0x1fcf840) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x1fcf840, receiver=0x26d3c90, e=0x127d3960) at kernel/qapplication.cpp:4458
#18 0x00007f3ddf2e7291 in QApplication::notify (this=0x7fffa00ec330, receiver=0x26d3c90, e=0x127d3960) at kernel/qapplication.cpp:4365
#19 0x00007f3de0967126 in KApplication::notify (this=0x7fffa00ec330, receiver=0x26d3c90, event=0x127d3960) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f3ddff31afc in QCoreApplication::notifyInternal (this=0x7fffa00ec330, receiver=0x26d3c90, event=0x127d3960) at kernel/qcoreapplication.cpp:787
#21 0x00007f3ddff3551f in sendEvent (event=0x127d3960, receiver=0x26d3c90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1f998e0) at kernel/qcoreapplication.cpp:1428
#23 0x00007f3ddff5ca73 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#24 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:277
#25 0x00007f3dd8744a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f3dd8745258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f3dd8745429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f3ddff5ced6 in QEventDispatcherGlib::processEvents (this=0x1f9afd0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f3ddf38a07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f3ddff30cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f3ddff30ef7 in QEventLoop::exec (this=0x7fffa00ec2c0, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f3ddff35789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x0000000000403629 in main (argc=1, argv=0x7fffa00ec958) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi