Application that crashed: 
Version of the application: 1.0
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I don't know what happened, as it was a couple of days ago and I just now created my account.

 -- Backtrace:
Application: Jockey (), signal: Segmentation fault
[KCrash Handler]
#5  0x03c241ac in QWidget::metric (this=0x92680d8, m=QPaintDevice::PdmDpiY) at kernel/qwidget_x11.cpp:2580
#6  0x03d863eb in QPaintDevice::logicalDpiY (this=0xbfaaf2f0, font=..., pd=0x92680e0) at ../../include/QtGui/../../src/gui/painting/qpaintdevice.h:96
#7  QFont (this=0xbfaaf2f0, font=..., pd=0x92680e0) at text/qfont.cpp:709
#8  0x03be2d47 in QWidgetPrivate::updateFont (this=0x9270208, font=...) at kernel/qwidget.cpp:4450
#9  0x03be2c78 in QWidgetPrivate::setFont_helper (this=0x9270208) at ../../include/QtGui/private/../../../src/gui/kernel/qwidget_p.h:274
#10 QWidgetPrivate::resolveFont (this=0x9270208) at kernel/qwidget.cpp:4427
#11 0x03bed3a8 in QWidget::setParent (this=0x92680d8, parent=0x0, f=...) at kernel/qwidget.cpp:9253
#12 0x03bedb1e in QWidget::setParent (this=0x0, parent=0x9270278) at kernel/qwidget.cpp:9172
#13 0x03bf4c86 in QWidgetAction::releaseWidget (this=0x925e200, widget=0x92680d8) at kernel/qwidgetaction.cpp:208
#14 0x03fde122 in ~QMenu (this=0x9256520, __in_chrg=<value optimized out>) at widgets/qmenu.cpp:1367
#15 0x01bd06bf in ~KMenu (this=0x9256520, __in_chrg=<value optimized out>) at ../../kdeui/widgets/kmenu.cpp:175
#16 0x01b73bdd in ~KSystemTrayIconPrivate (this=0x925b7a0, __in_chrg=<value optimized out>) at ../../kdeui/util/ksystemtrayicon.cpp:81
#17 ~KSystemTrayIcon (this=0x925b7a0, __in_chrg=<value optimized out>) at ../../kdeui/util/ksystemtrayicon.cpp:182
#18 0x06f8d891 in sipKSystemTrayIcon::~sipKSystemTrayIcon() () from /usr/lib/pymodules/python2.6/PyKDE4/kdeui.so
#19 0x0072646f in QObjectPrivate::deleteChildren (this=0x925b7a0) at kernel/qobject.cpp:1847
#20 0x03be585b in ~QWidget (this=0x921e238, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1367
#21 0x04081184 in ~QDialog (this=0x921e238, __in_chrg=<value optimized out>) at dialogs/qdialog.cpp:298
#22 0x013de2cf in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#23 0x0137c497 in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#24 0x0137c4da in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#25 0x001d6a1b in ?? () from /usr/lib/pymodules/python2.6/sip.so
#26 0x001d6a51 in ?? () from /usr/lib/pymodules/python2.6/sip.so
#27 0x080a8ee3 in ?? ()
#28 0x0808e634 in ?? ()
#29 0x080a8f31 in ?? ()
#30 0x0808cf19 in ?? ()
#31 0x0808f377 in PyDict_SetItem ()
#32 0x08090cd3 in _PyModule_Clear ()
#33 0x080ed815 in PyImport_Cleanup ()
#34 0x080fa305 in Py_Finalize ()
#35 0x080f9daf in ?? ()
#36 0x080f9f9d in PyErr_PrintEx ()
#37 0x080fa1d2 in PyErr_Print ()
#38 0x080facfb in PyRun_SimpleFileExFlags ()
#39 0x0805c8d8 in Py_Main ()
#40 0x0805baeb in main ()

Reported using DrKonqi