Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

While I try to "Find Best Server" in Software Properties, it crashes with the following trace log:

Application: Software Sources (software-properties-kde), signal SIGABRT
[Current thread is 0 (LWP 19439)]

Thread 3 (Thread 0xabc02b90 (LWP 19470)):
#0  0xb7ff6430 in __kernel_vsyscall ()
#1  0xb7fb5405 in sem_wait@@GLIBC_2.1 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x080f5750 in PyThread_acquire_lock ()
#3  0x080f9a1a in ?? ()
#4  0x080cea39 in PyEval_EvalFrameEx ()
#5  0x080d0345 in PyEval_EvalCodeEx ()
#6  0x080ce728 in PyEval_EvalFrameEx ()
#7  0x080d0345 in PyEval_EvalCodeEx ()
#8  0x080ce728 in PyEval_EvalFrameEx ()
#9  0x080d0345 in PyEval_EvalCodeEx ()
#10 0x080ce728 in PyEval_EvalFrameEx ()
#11 0x080d0345 in PyEval_EvalCodeEx ()
#12 0x080ce728 in PyEval_EvalFrameEx ()
#13 0x080d0345 in PyEval_EvalCodeEx ()
#14 0x0811797e in ?? ()
#15 0x0805d867 in PyObject_Call ()
#16 0x080cd502 in PyEval_EvalFrameEx ()
#17 0x080cfbf5 in PyEval_EvalFrameEx ()
#18 0x080cfbf5 in PyEval_EvalFrameEx ()
#19 0x080d0345 in PyEval_EvalCodeEx ()
#20 0x08117891 in ?? ()
#21 0x0805d867 in PyObject_Call ()
#22 0x08063a7a in ?? ()
#23 0x0805d867 in PyObject_Call ()
#24 0x080c850c in PyEval_CallObjectWithKeywords ()
#25 0x080f9e68 in ?? ()
#26 0xb7faf50f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#27 0xb7efda0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xa0a32b90 (LWP 19484)):
#0  0xb7ff6430 in __kernel_vsyscall ()
#1  0xb7fb3075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb6162c87 in ?? () from /usr/lib/libxcb.so.1
#3  0xb6163b9f in xcb_send_request () from /usr/lib/libxcb.so.1
#4  0xb622d166 in _XPutXCBBuffer () from /usr/lib/libX11.so.6
#5  0xb622d530 in ?? () from /usr/lib/libX11.so.6
#6  0xb6397f82 in XRenderFreePicture () from /usr/lib/libXrender.so.1
#7  0xb66136bf in ?? () from /usr/lib/libQtGui.so.4
#8  0xb661417d in ?? () from /usr/lib/libQtGui.so.4
#9  0xb66089ad in QPixmap::deref () from /usr/lib/libQtGui.so.4
#10 0xb6608db0 in QPixmap::~QPixmap () from /usr/lib/libQtGui.so.4
#11 0xb66438f1 in QPaintEngine::drawImage () from /usr/lib/libQtGui.so.4
#12 0xb66f00d9 in ?? () from /usr/lib/libQtGui.so.4
#13 0xb664fbc5 in ?? () from /usr/lib/libQtGui.so.4
#14 0xb6654d4f in QPainter::drawPath () from /usr/lib/libQtGui.so.4
#15 0xb665680b in QPainter::drawRoundRect () from /usr/lib/libQtGui.so.4
#16 0xb4dc8c4d in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#17 0xb4dd342c in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#18 0xb4ddd639 in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#19 0xb5103a04 in KStyle::drawPrimitive () from /usr/lib/libkdeui.so.5
#20 0xb50fbfcd in KStyle::drawControl () from /usr/lib/libkdeui.so.5
#21 0xb4dd56b2 in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#22 0xb50fc388 in KStyle::drawControl () from /usr/lib/libkdeui.so.5
#23 0xb4dd56b2 in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#24 0xb6928a3a in QPushButton::paintEvent () from /usr/lib/libQtGui.so.4
#25 0xb719b33d in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#26 0xb659974b in QWidget::event () from /usr/lib/libQtGui.so.4
#27 0xb688303e in QAbstractButton::event () from /usr/lib/libQtGui.so.4
#28 0xb6929910 in QPushButton::event () from /usr/lib/libQtGui.so.4
#29 0xb719a56d in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#30 0xb65418ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#31 0xb65497fa in QApplication::notify () from /usr/lib/libQtGui.so.4
#32 0xb50eb2ad in KApplication::notify () from /usr/lib/libkdeui.so.5
#33 0xb56b1146 in sipKApplication::notify () from /usr/lib/python2.5/site-packages/PyKDE4/kdeui.so
#34 0xb75dee61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#35 0xb65a23de in ?? () from /usr/lib/libQtGui.so.4
#36 0xb6598110 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#37 0xb65988b2 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#38 0xb6597d88 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#39 0xb6707fae in ?? () from /usr/lib/libQtGui.so.4
#40 0xb67084a7 in ?? () from /usr/lib/libQtGui.so.4
#41 0xb6599576 in QWidget::event () from /usr/lib/libQtGui.so.4
#42 0xb6fa105c in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#43 0xb65418ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#44 0xb65497fa in QApplication::notify () from /usr/lib/libQtGui.so.4
#45 0xb50eb2ad in KApplication::notify () from /usr/lib/libkdeui.so.5
#46 0xb56b1146 in sipKApplication::notify () from /usr/lib/python2.5/site-packages/PyKDE4/kdeui.so
#47 0xb75dee61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#48 0xb65cb636 in QWidgetPrivate::dirtyWidget_sys () from /usr/lib/libQtGui.so.4
#49 0xb6706354 in ?? () from /usr/lib/libQtGui.so.4
#50 0xb6706959 in QWidget::repaint () from /usr/lib/libQtGui.so.4
#51 0xb6591618 in QWidget::repaint () from /usr/lib/libQtGui.so.4
#52 0xb6927d8d in QProgressBar::setValue () from /usr/lib/libQtGui.so.4
#53 0xb69d38bb in QProgressDialog::setValue () from /usr/lib/libQtGui.so.4
#54 0xb6f7ef9d in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#55 0x080cea39 in PyEval_EvalFrameEx ()
#56 0x080d0345 in PyEval_EvalCodeEx ()
#57 0x080ce728 in PyEval_EvalFrameEx ()
#58 0x080cfbf5 in PyEval_EvalFrameEx ()
#59 0x080cfbf5 in PyEval_EvalFrameEx ()
#60 0x080d0345 in PyEval_EvalCodeEx ()
#61 0x08117891 in ?? ()
#62 0x0805d867 in PyObject_Call ()
#63 0x08063a7a in ?? ()
#64 0x0805d867 in PyObject_Call ()
#65 0x080c850c in PyEval_CallObjectWithKeywords ()
#66 0x080f9e68 in ?? ()
#67 0xb7faf50f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#68 0xb7efda0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7e1b8c0 (LWP 19439)):
[KCrash Handler]
#6  0xb7ff6430 in __kernel_vsyscall ()
#7  0xb7e478a0 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb7e49268 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb7e4072e in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#10 0xb622d424 in _XGetXCBBuffer () from /usr/lib/libX11.so.6
#11 0xb622e843 in _XSend () from /usr/lib/libX11.so.6
#12 0xb622e9c0 in _XEventsQueued () from /usr/lib/libX11.so.6
#13 0xb621690f in XEventsQueued () from /usr/lib/libX11.so.6
#14 0xb65dc0da in ?? () from /usr/lib/libQtGui.so.4
#15 0xb741d622 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#16 0xb741daaa in ?? () from /usr/lib/libglib-2.0.so.0
#17 0xb741df81 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#18 0xb7609497 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#19 0xb65dbea5 in ?? () from /usr/lib/libQtGui.so.4
#20 0xb75dd52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#21 0xb75dd6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#22 0xb69ae987 in QDialog::exec () from /usr/lib/libQtGui.so.4
#23 0xb7143899 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#24 0x080cea39 in PyEval_EvalFrameEx ()
#25 0x080cfbf5 in PyEval_EvalFrameEx ()
#26 0x080d0345 in PyEval_EvalCodeEx ()
#27 0x08117891 in ?? ()
#28 0x0805d867 in PyObject_Call ()
#29 0x08063a7a in ?? ()
#30 0x0805d867 in PyObject_Call ()
#31 0x080c850c in PyEval_CallObjectWithKeywords ()
#32 0xb76d9e47 in sip_api_invoke_slot () from /usr/lib/python2.5/site-packages/sip.so
#33 0xb773c1d5 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtCore.so
#34 0xb773cdbb in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtCore.so
#35 0xb773ce62 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtCore.so
#36 0xb75f3a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#37 0xb75f47e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#38 0xb689bda3 in QComboBox::currentIndexChanged () from /usr/lib/libQtGui.so.4
#39 0xb689deaa in ?? () from /usr/lib/libQtGui.so.4
#40 0xb689f80a in ?? () from /usr/lib/libQtGui.so.4
#41 0xb68a042e in ?? () from /usr/lib/libQtGui.so.4
#42 0xb68a5a4e in QComboBox::qt_metacall () from /usr/lib/libQtGui.so.4
#43 0xb71117e8 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#44 0xb75f3a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#45 0xb75f47e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#46 0xb6b30fa3 in ?? () from /usr/lib/libQtGui.so.4
#47 0xb689dc79 in ?? () from /usr/lib/libQtGui.so.4
#48 0xb75de04a in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#49 0xb65418ca in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#50 0xb654a0e1 in QApplication::notify () from /usr/lib/libQtGui.so.4
#51 0xb50eb2ad in KApplication::notify () from /usr/lib/libkdeui.so.5
#52 0xb56b1146 in sipKApplication::notify () from /usr/lib/python2.5/site-packages/PyKDE4/kdeui.so
#53 0xb75dee61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#54 0xb654936e in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#55 0xb65b38de in ?? () from /usr/lib/libQtGui.so.4
#56 0xb65b29e5 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#57 0xb65dc7aa in ?? () from /usr/lib/libQtGui.so.4
#58 0xb741a718 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#59 0xb741ddc3 in ?? () from /usr/lib/libglib-2.0.so.0
#60 0xb741df81 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#61 0xb7609478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#62 0xb65dbea5 in ?? () from /usr/lib/libQtGui.so.4
#63 0xb75dd52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#64 0xb75dd6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#65 0xb75dfda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#66 0xb6541767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#67 0xb714d3c2 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#68 0x080cea39 in PyEval_EvalFrameEx ()
#69 0x080cfbf5 in PyEval_EvalFrameEx ()
#70 0x080d0345 in PyEval_EvalCodeEx ()
#71 0x080d0557 in PyEval_EvalCode ()
#72 0x080edf8f in PyRun_FileExFlags ()
#73 0x080ee25a in PyRun_SimpleFileExFlags ()
#74 0x080595e7 in Py_Main ()
#75 0x08058962 in main ()