Application: konqueror (4.4.5 (KDE 4.4.5))
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.3
Operating System: Linux 2.6.32-5-amd64 x86_64
Distribution: Debian GNU/Linux 6.0.5 (squeeze)

-- Information about the crash:
I had about 10 tabs open, and had just clicked 'Back' while reading an article on "The H" website, at which point Konqueror immediately crashed.  I see crashes in this circumstance fairly often.

 -- Backtrace:
Application: Konqueror (konqueror), signal: Segmentation fault
The current source language is "auto; currently asm".
[Current thread is 1 (Thread 0x7f56cdad6760 (LWP 2433))]

Thread 4 (Thread 0x7f56affff700 (LWP 2548)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:211
#1  0x00007f56b4849f41 in ?? () from /usr/lib/libxine.so.1
#2  0x00007f56c6b3e8ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007f56cd36192d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f56a5d91700 (LWP 2550)):
#0  0x00007f56cd3569d3 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f56c64922c9 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007f56c649271c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x00007f56cb169706 in QEventDispatcherGlib::processEvents (this=0x3526750, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4  0x00007f56cb13e9c2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007f56cb13ed9c in QEventLoop::exec (this=0x7f56a5d90dc0, flags=) at kernel/qeventloop.cpp:201
#6  0x00007f56cb04e77b in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7  0x00007f56b4aa6400 in ?? () from /usr/lib/qt4/plugins/phonon_backend/phonon_xine.so
#8  0x00007f56cb050e15 in QThreadPrivate::start (arg=0x35261c0) at thread/qthread_unix.cpp:248
#9  0x00007f56c6b3e8ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007f56cd36192d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f569fbe5700 (LWP 2556)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:211
#1  0x00007f56b4849f41 in ?? () from /usr/lib/libxine.so.1
#2  0x00007f56c6b3e8ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007f56cd36192d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()
The current source language is "auto; currently c".

Thread 1 (Thread 0x7f56cdad6760 (LWP 2433)):
[KCrash Handler]
#5  DOM::DocumentImpl::paintDevice (value=0x70dfed0, style=0x10275470, part=0x740c260, op=MinPrefix) at ../../khtml/xml/dom_docimpl.h:378
#6  widthMediaFeatureEval (value=0x70dfed0, style=0x10275470, part=0x740c260, op=MinPrefix) at ../../khtml/css/css_mediaquery.cpp:585
#7  0x00007f56bdd00793 in khtml::MediaQueryEvaluator::eval (this=0x784d470, expr=0x118cda90) at ../../khtml/css/css_mediaquery.cpp:780
#8  0x00007f56bdd0090a in khtml::MediaQueryEvaluator::eval (this=0x784d470, mediaList=0x230baf0, styleSelector=0xfe56fe0) at ../../khtml/css/css_mediaquery.cpp:296
#9  0x00007f56bdcda00c in khtml::CSSStyleSelectorList::append (this=0x2417270, sheet=0x11b632a0, medium=<value optimized out>, styleSelector=<value optimized out>)
    at ../../khtml/css/cssstyleselector.cpp:2064
#10 0x00007f56bdce9f21 in CSSStyleSelector (this=0xfe56fe0, doc=0xf708320, userStyleSheet=<value optimized out>, styleSheets=<value optimized out>, url=<value optimized out>, 
    _strictParsing=<value optimized out>) at ../../khtml/css/cssstyleselector.cpp:282
#11 0x00007f56bdb9d1e7 in DOM::DocumentImpl::rebuildStyleSelector (this=0xf708320) at ../../khtml/xml/dom_docimpl.cpp:2394
#12 0x00007f56bdb9d31d in DOM::DocumentImpl::updateStyleSelector (this=0xf708320, shallow=false) at ../../khtml/xml/dom_docimpl.cpp:2213
#13 0x00007f56bdbf90ac in DOM::HTMLStyleElementImpl::parseText (this=0x12147150) at ../../khtml/html/html_headimpl.cpp:667
#14 0x00007f56bdba561c in DOM::NodeBaseImpl::addChild (this=0x12147150, newChild=0x9b4be60) at ../../khtml/xml/dom_nodeimpl.cpp:1811
#15 0x00007f56bdbe4133 in khtml::KHTMLParser::insertNode (this=0x22e3620, n=0x9b4be60, flat=true) at ../../khtml/html/htmlparser.cpp:414
#16 0x00007f56bdbe685b in khtml::KHTMLParser::parseToken (this=0x22e3620, t=0xabb00b8) at ../../khtml/html/htmlparser.cpp:302
#17 0x00007f56bdbe7211 in khtml::HTMLTokenizer::processToken (this=0xabb0090) at ../../khtml/html/htmltokenizer.cpp:2056
#18 0x00007f56bdbeebec in khtml::HTMLTokenizer::parseSpecial (this=0xabb0090, src=<value optimized out>) at ../../khtml/html/htmltokenizer.cpp:372
#19 0x00007f56bdbf03fe in khtml::HTMLTokenizer::parseTag (this=0xabb0090, src=...) at ../../khtml/html/htmltokenizer.cpp:1560
#20 0x00007f56bdbf1b90 in khtml::HTMLTokenizer::write (this=0xabb0090, str=<value optimized out>, appendData=<value optimized out>) at ../../khtml/html/htmltokenizer.cpp:1810
#21 0x00007f56bdb3f325 in KHTMLPart::write (this=<value optimized out>, 
    data=0xf626578 "<!DOCTYPE html><html><head><meta charset=\"utf-8\"><title>Twitter Follow Button</title><link rel=\"dns-prefetch\" href=\"//twitter.com\"><link rel=\"profile\" href=\"http://microformats.org/profile/hcard\"><sty"..., len=<value optimized out>) at ../../khtml/khtml_part.cpp:2102
#22 0x00007f56bdb32af4 in KHTMLPart::slotRestoreData (this=0x740c260, data=...) at ../../khtml/khtml_part.cpp:1804
#23 0x00007f56bdb5c450 in KHTMLPart::qt_metacall (this=0x740c260, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff2f2a5450) at ./khtml_part.moc:279
#24 0x00007f56cb1532e6 in QMetaObject::activate (sender=0x1ccff00, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3295
#25 0x00007f56bdb80542 in KHTMLPageCacheDelivery::emitData (this=0x0, _t1=<value optimized out>) at ./khtml_pagecache.moc:147
#26 0x00007f56bdb80b56 in KHTMLPageCache::sendData (this=0x11d00b0) at ../../khtml/khtml_pagecache.cpp:250
#27 0x00007f56bdb81679 in KHTMLPageCache::qt_metacall (this=0x11d00b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff2f2a5580) at ./khtml_pagecache.moc:75
#28 0x00007f56cb1532e6 in QMetaObject::activate (sender=0x3b60a90, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3295
#29 0x00007f56cb15a7ef in QSingleShotTimer::timerEvent (this=0x3b60a90) at kernel/qtimer.cpp:308
#30 0x00007f56cb14fb43 in QObject::event (this=0x3b60a90, e=0x7fff2f2a5ce0) at kernel/qobject.cpp:1212
#31 0x00007f56ca26732c in QApplicationPrivate::notify_helper (this=0xb44940, receiver=0x3b60a90, e=0x7fff2f2a5ce0) at kernel/qapplication.cpp:4302
#32 0x00007f56ca26d80b in QApplication::notify (this=0x7fff2f2a6190, receiver=0x3b60a90, e=0x7fff2f2a5ce0) at kernel/qapplication.cpp:4185
#33 0x00007f56cbb28796 in KApplication::notify (this=0x7fff2f2a6190, receiver=0x3b60a90, event=0x7fff2f2a5ce0) at ../../kdeui/kernel/kapplication.cpp:302
#34 0x00007f56cb14009c in QCoreApplication::notifyInternal (this=0x7fff2f2a6190, receiver=0x3b60a90, event=0x7fff2f2a5ce0) at kernel/qcoreapplication.cpp:726
#35 0x00007f56cb16ce72 in QCoreApplication::sendEvent (this=0xb48600) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#36 QTimerInfoList::activateTimers (this=0xb48600) at kernel/qeventdispatcher_unix.cpp:603
#37 0x00007f56cb1699e8 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#38 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#39 0x00007f56c648e6f2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#40 0x00007f56c6492568 in ?? () from /lib/libglib-2.0.so.0
#41 0x00007f56c649271c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#42 0x00007f56cb1696b3 in QEventDispatcherGlib::processEvents (this=0xb27f80, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#43 0x00007f56ca31719e in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#44 0x00007f56cb13e9c2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#45 0x00007f56cb13ed9c in QEventLoop::exec (this=0x7fff2f2a5f80, flags=) at kernel/qeventloop.cpp:201
#46 0x00007f56cb143a2b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#47 0x00007f56cd6b776b in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/konqueror/src/konqmain.cpp:257
#48 0x00007f56cd2b0c8d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff2f2a6b68) at libc-start.c:228
#49 0x0000000000400699 in _start ()
The current source language is "auto; currently asm".

Reported using DrKonqi