Application: plasma-desktop (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
Since my upgrade from Kubuntu 13.04 to 13.10 my plasma panel keeps crashing at intervals of about 5 minutes. It immediately reappears, but still this is annoying. Full-screen applications expand and shrink during this process. This happened on two of my systems, with user accounts that had a similar (but independent, if I'm not mistaken) configuration. It does not happen on a rarely-used different user account. Also I could get rid of the problem by starting over with a new KDE configuration (by renaming ~/.kde). But that means a lot of work reconfiguring several applications...

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Floating point exception
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9b4e2c97c0 (LWP 2834))]

Thread 5 (Thread 0x7f9b2eb37700 (LWP 2840)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9b46f1e06b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f9b46f1e0a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f9b41567f6e in start_thread (arg=0x7f9b2eb37700) at pthread_create.c:311
#4  0x00007f9b4dbba9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f9aa6217700 (LWP 2843)):
#0  0x00007f9b40e90391 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9b40e50585 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9b40e5079c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9b4a747a76 in QEventDispatcherGlib::processEvents (this=0x7f9a980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f9b4a7195ef in QEventLoop::processEvents (this=this@entry=0x7f9aa6216d70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f9b4a7198e5 in QEventLoop::exec (this=this@entry=0x7f9aa6216d70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f9b4a61888f in QThread::exec (this=this@entry=0x1871ec0) at thread/qthread.cpp:542
#7  0x00007f9b4a6fad13 in QInotifyFileSystemWatcherEngine::run (this=0x1871ec0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f9b4a61af2f in QThreadPrivate::start (arg=0x1871ec0) at thread/qthread_unix.cpp:338
#9  0x00007f9b41567f6e in start_thread (arg=0x7f9aa6217700) at pthread_create.c:311
#10 0x00007f9b4dbba9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f9a9f7fe700 (LWP 2847)):
#0  0x00007f9b40e900da in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9b40e90389 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9b40e4ffde in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9b40e5062b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9b40e50afa in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9aa48039d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f9b40e750e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f9b41567f6e in start_thread (arg=0x7f9a9f7fe700) at pthread_create.c:311
#8  0x00007f9b4dbba9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f9a9edaf700 (LWP 2848)):
#0  0x00007f9b4dbadf7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9b40e50694 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9b40e5079c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9b4a747a76 in QEventDispatcherGlib::processEvents (this=0x7f9a900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f9b4a7195ef in QEventLoop::processEvents (this=this@entry=0x7f9a9edaed70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f9b4a7198e5 in QEventLoop::exec (this=this@entry=0x7f9a9edaed70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f9b4a61888f in QThread::exec (this=this@entry=0xd037c0) at thread/qthread.cpp:542
#7  0x00007f9b4a6fad13 in QInotifyFileSystemWatcherEngine::run (this=0xd037c0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f9b4a61af2f in QThreadPrivate::start (arg=0xd037c0) at thread/qthread_unix.cpp:338
#9  0x00007f9b41567f6e in start_thread (arg=0x7f9a9edaf700) at pthread_create.c:311
#10 0x00007f9b4dbba9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f9b4e2c97c0 (LWP 2834)):
[KCrash Handler]
#6  Image::nextSlide (this=0xeb15f0) at ../../../../../plasma/generic/wallpapers/image/image.cpp:788
#7  0x00007f9b2ef5e4f1 in Image::qt_static_metacall (_o=0xeb15f0, _id=0, _a=0x0, _c=<optimized out>) at ./image.moc:150
#8  0x00007f9b4a72ea58 in QMetaObject::activate (sender=sender@entry=0xf8e720, m=m@entry=0x7f9b4b1b9c80 <KDirWatch::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffffe2ed8f0) at kernel/qobject.cpp:3539
#9  0x00007f9b4ae0a135 in KDirWatch::deleted (this=this@entry=0xf8e720, _t1=...) at ./kdirwatch.moc:127
#10 0x00007f9b4ae0c5e2 in KDirWatch::setDeleted (this=0xf8e720, _file=...) at ../../kdecore/io/kdirwatch.cpp:1908
#11 0x00007f9b4a732dce in QObject::event (this=0xf8e720, e=<optimized out>) at kernel/qobject.cpp:1194
#12 0x00007f9b49ab1dfc in QApplicationPrivate::notify_helper (this=this@entry=0xb48720, receiver=receiver@entry=0xf8e720, e=e@entry=0x444d040) at kernel/qapplication.cpp:4567
#13 0x00007f9b49ab8470 in QApplication::notify (this=this@entry=0xb42c30, receiver=receiver@entry=0xf8e720, e=e@entry=0x444d040) at kernel/qapplication.cpp:4353
#14 0x00007f9b4b3f1a6a in KApplication::notify (this=0xb42c30, receiver=0xf8e720, event=0x444d040) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f9b4a71a8bd in QCoreApplication::notifyInternal (this=0xb42c30, receiver=receiver@entry=0xf8e720, event=event@entry=0x444d040) at kernel/qcoreapplication.cpp:946
#16 0x00007f9b4a71de1f in sendEvent (event=0x444d040, receiver=0xf8e720) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xaa01f0) at kernel/qcoreapplication.cpp:1570
#18 0x00007f9b4a71e2c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#19 0x00007f9b4a748073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#20 postEventSourceDispatch (s=0xb4b5d0) at kernel/qeventdispatcher_glib.cpp:279
#21 0x00007f9b40e503a6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f9b40e506f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f9b40e5079c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f9b4a747a55 in QEventDispatcherGlib::processEvents (this=0xaa1ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#25 0x00007f9b49b539d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f9b4a7195ef in QEventLoop::processEvents (this=this@entry=0x7ffffe2edf70, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f9b4a7198e5 in QEventLoop::exec (this=this@entry=0x7ffffe2edf70, flags=...) at kernel/qeventloop.cpp:204
#28 0x00007f9b4a71ee5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#29 0x00007f9b49ab034c in QApplication::exec () at kernel/qapplication.cpp:3828
#30 0x00007f9b4dec427c in kdemain (argc=1, argv=0x7ffffe2ee1c8) at ../../../../plasma/desktop/shell/main.cpp:126
#31 0x00007f9b4dae1de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7ffffe2ee1c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffffe2ee1b8) at libc-start.c:260
#32 0x000000000040070e in _start ()

Reported using DrKonqi