Version:            (using KDE KDE 3.5.5)
Installed from:    Ubuntu Packages

I was browsing these 2 pages using Konqueror:
http://blogs.msdn.com/michael_howard/archive/2007/01/10/why-windows-vista-is-unaffected-by-the-vml-bug.aspx
http://blogs.msdn.com/michael_howard/archive/2005/12/06/500629.aspx

At some point (might have been after hibernating/unhibernating a few times, I am not sure), Konqueror stopped responding to keyboard and mouse events. It redraws just fine (no freeze), but I cannot do anything with the GUI.

I have attached debugger to it and it seems some internal processEvents loop is running inside processing XMLHttpRequest. Here is the full backtrace:
(gdb) thread apply all bt

Thread 1 (Thread -1230649664 (LWP 20722)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0x4226308d in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6daaa8d in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#3  0xb6e1ea2f in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#4  0xb6e04a79 in QApplication::enter_loop () from /usr/lib/libqt-mt.so.3
#5  0xb7a7fecf in KIO::NetAccess::enter_loop (this=0xbff5f760) at netaccess.cpp:498
#6  0xb7ac34b5 in KIO::NetAccess::synchronousRunInternal (this=0xbff5f760, job=0x89a0a98, window=0xfffffdfe,
    data=0xbff5f84c, finalURL=0xbff5f824, metaData=0xbff5f85c) at netaccess.cpp:479
#7  0xb7ac35e2 in KIO::NetAccess::synchronousRun (job=0xfffffdfe, window=0xfffffdfe, data=0xfffffdfe, finalURL=0xfffffdfe,
    metaData=0xfffffdfe) at netaccess.cpp:277
#8  0xb63714fe in KJS::XMLHttpRequest::send (this=0x89a0508, _body=@0xfffffdfe) at xmlhttprequest.cpp:386
#9  0xb6396c51 in KJS::XMLHttpRequestProtoFunc::tryCall (this=0xfffffdfe, exec=0xbff600d4, thisObj=@0xbff5fc60,
    args=@0xbff5fc54) at xmlhttprequest.cpp:745
#10 0xb6398784 in KJS::DOMFunction::call (this=0x80e00b4, exec=0xbff600d4, thisObj=@0xfffffdfe, args=@0xfffffdfe)
    at kjs_binding.cpp:136
#11 0xb60bff8f in KJS::Object::call (this=0xfffffdfe, exec=0xbff600d4, thisObj=@0xfffffdfe, args=@0xfffffdfe)
    at object.cpp:73
#12 0xb60ce4a6 in KJS::FunctionCallNode::evaluate (this=0x87313e8, exec=0xbff600d4) at nodes.cpp:870
#13 0xb60d0ba8 in KJS::ExprStatementNode::execute (this=0x8731400, exec=0xbff600d4) at nodes.cpp:1980
#14 0xb60d533d in KJS::SourceElementsNode::execute (this=0x87312f8, exec=0xbff600d4) at nodes.cpp:3097
#15 0xb60d0a30 in KJS::BlockNode::execute (this=0x8731468, exec=0xbff600d4) at nodes.cpp:1942
#16 0xb60d4d51 in KJS::TryNode::execute (this=0x8731520, exec=0xbff600d4) at nodes.cpp:2871
#17 0xb60d533d in KJS::SourceElementsNode::execute (this=0x8730590, exec=0xbff600d4) at nodes.cpp:3097
#18 0xb60d0a30 in KJS::BlockNode::execute (this=0x8731720, exec=0xbff600d4) at nodes.cpp:1942
#19 0xb60d6331 in KJS::DeclaredFunctionImp::execute (this=0xfffffdfe, exec=0xfffffdfe) at function.cpp:588
#20 0xb60bc93d in KJS::FunctionImp::call (this=0x86fd380, exec=0x86ec398, thisObj=@0x80e00b4, args=@0x888863c)
    at function.cpp:363
#21 0xb635693f in KJS::ScheduledAction::execute (this=0x8888638, window=0x86ee1c0) at kjs_window.cpp:1946
#22 0xb6360310 in KJS::WindowQObject::timerEvent (this=0x81e9968) at kjs_window.cpp:2091
#23 0xb6e6d270 in QObject::event () from /usr/lib/libqt-mt.so.3
#24 0xb6e05f3e in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#25 0xb6e0613a in QApplication::notify () from /usr/lib/libqt-mt.so.3
#26 0xb759f1cd in KApplication::notify (this=0xbff60888, receiver=0x81e9968, event=0xbff60528) at kapplication.cpp:550
#27 0xb6d97157 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#28 0xb6df792b in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#29 0xb6daaf67 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#30 0xb6e1ea2f in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#31 0xb6e1e952 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#32 0xb6e04a4d in QApplication::exec () from /usr/lib/libqt-mt.so.3
#33 0xb7ebe17f in kdemain () from /usr/lib/libkdeinit_konqueror.so
#34 0x421b5ea2 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#35 0x080483b5 in ?? ()