Version:           4.0 (using KDE 4.1.3)
Compiler:          gcc-Version 4.3.2 (Ubuntu 4.3.2-1ubuntu12)  
OS:                Linux
Installed from:    Ubuntu Packages

I don't know where it comes from and what actually happened, but I get the following message every few minutes. I don't know a lot about computers and the only thing I tried is to delete the .kde directory and restart. This worked once for a plasma error, but now it didn't work.

The application KNotify (knotify4) crashed and caused the signal 11 (SIGSEGV).
details:
Anwendung: KNotify (knotify4), Signal SIGSEGV
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7f924179d6f0 (LWP 20661)]
[New Thread 0x41207950 (LWP 21053)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#5  0x00007f923f119690 in strlen () from /lib/libc.so.6
#6  0x00007f923f0e244e in vfprintf () from /lib/libc.so.6
#7  0x00007f923f193d08 in __vsnprintf_chk () from /lib/libc.so.6
#8  0x00007f92334b9fad in ?? () from /usr/lib/libxine.so.1
#9  0x00007f923349c9f4 in xine_log () from /usr/lib/libxine.so.1
#10 0x00007f92334a7ecc in ?? () from /usr/lib/libxine.so.1
#11 0x00007f923371bfc2 in ?? () from /usr/lib/kde4/phonon_xine.so
#12 0x00007f923371f5dc in KPluginFactory::createInstance<Phonon::Xine::Backend, QObject> () from /usr/lib/kde4/phonon_xine.so
#13 0x00007f924133f845 in KPluginFactory::create ()
   from /usr/lib/libkdecore.so.5
#14 0x00007f92352fc5b9 in ?? ()
   from /usr/lib/kde4/plugins/phonon_platform/kde.so
#15 0x00007f92352fdf0d in ?? ()
   from /usr/lib/kde4/plugins/phonon_platform/kde.so
#16 0x00007f923f7484c8 in ?? () from /usr/lib/libphonon.so.4
#17 0x00007f923f749407 in Phonon::Factory::backend ()
   from /usr/lib/libphonon.so.4
#18 0x00007f923f744cf2 in ?? () from /usr/lib/libphonon.so.4
#19 0x00007f923f74525d in ?? () from /usr/lib/libphonon.so.4
#20 0x00007f923f73f6b0 in ?? () from /usr/lib/libphonon.so.4
#21 0x00007f923f740341 in Phonon::AudioOutput::AudioOutput ()
   from /usr/lib/libphonon.so.4
#22 0x000000000040cab1 in _start ()
#0  0x00007f923f13f621 in nanosleep () from /lib/libc.so.6