Version:           4:4.1.3-0ubuntu1~interpid (using KDE 4.1.3)
Compiler:          gcc (Ubuntu 4.3.2-1ubuntu11) 4.3.2 
OS:                Linux
Installed from:    Ubuntu Packages

Application is launched though GNOME file manager (Nautilus 2.24.1) -> "Open with Okular". It has happend once, right after installation.

Application: Okular (okular), signal SIGABRT
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[Thread debugging using libthread_db enabled]
[New Thread 0xb61766c0 (LWP 10141)]
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[KCrash handler]
#6  0xb7ffc430 in __kernel_vsyscall ()
#7  0xb6a38880 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb6a3a248 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb75ea795 in qt_message_output () from /usr/lib/libQtCore.so.4
#10 0xb75ea872 in qFatal () from /usr/lib/libQtCore.so.4
#11 0xb75ea915 in qt_assert () from /usr/lib/libQtCore.so.4
#12 0xb78dff82 in KMimeTypeTrader::query () from /usr/lib/libkdecore.so.5
#13 0xb4ac9f5c in Okular::Document::openDocument ()
   from /usr/lib/libokularcore.so.1
#14 0xb4b50ec7 in ?? () from /usr/lib/kde4/okularpart.so
#15 0xb75757b3 in KParts::ReadOnlyPart::openUrl ()
   from /usr/lib/libkparts.so.4
#16 0xb4b4b92c in ?? () from /usr/lib/kde4/okularpart.so
#17 0x0804efc7 in _start ()
#0  0xb7ffc430 in __kernel_vsyscall ()