Application that crashed: kate
Version of the application: 3.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I was moving the mouse up and down the page checking for missing </div> I wasn't even clicking anything.

 -- Backtrace:
Application: Kate (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#5  KateCodeFoldingNode::getEnd (this=0x2600650, tree=0x121a710, end=0x7fff5d6e08f0) at /build/buildd/kde4libs-4.3.2/kate/syntax/katecodefolding.cpp:86
#6  0x00007f78458d0bde in KateIconBorder::showBlock (this=0x2183a80, line=69) at /build/buildd/kde4libs-4.3.2/kate/view/kateviewhelpers.cpp:1275
#7  0x00007f78458d1c4a in KateIconBorder::mouseMoveEvent (this=0x2183a80, e=0x7fff5d6e1360) at /build/buildd/kde4libs-4.3.2/kate/view/kateviewhelpers.cpp:1328
#8  0x00007f78527e6f58 in QWidget::event (this=0x2183a80, event=0x7fff5d6e1360) at kernel/qwidget.cpp:7534
#9  0x00007f7852795f4d in QApplicationPrivate::notify_helper (this=0xe4b9f0, receiver=0x2183a80, e=0x7fff5d6e1360) at kernel/qapplication.cpp:4056
#10 0x00007f785279e8ea in QApplication::notify (this=<value optimized out>, receiver=0x2183a80, e=0x7fff5d6e1360) at kernel/qapplication.cpp:3758
#11 0x00007f78538a8abb in KApplication::notify (this=0x7fff5d6e3330, receiver=0x2183a80, event=0x7fff5d6e1360) at /build/buildd/kde4libs-4.3.2/kdeui/kernel/kapplication.cpp:302
#12 0x00007f78551d06ac in QCoreApplication::notifyInternal (this=0x7fff5d6e3330, receiver=0x2183a80, event=0x7fff5d6e1360) at kernel/qcoreapplication.cpp:610
#13 0x00007f785279db38 in QApplicationPrivate::sendMouseEvent (receiver=0x2183a80, event=0x7fff5d6e1360, alienWidget=0x2183a80, nativeWidget=0x1092ab0, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7f78531cd010) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#14 0x00007f7852807b19 in QETWidget::translateMouseEvent (this=0x1092ab0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#15 0x00007f7852806b53 in QApplication::x11ProcessEvent (this=0x7fff5d6e3330, event=0x7fff5d6e2ee0) at kernel/qapplication_x11.cpp:3550
#16 0x00007f785282f454 in x11EventSourceDispatch (s=0xe4f6a0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#17 0x00007f785122920a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#18 0x00007f785122c8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#19 0x00007f785122ca7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#20 0x00007f78551f9a8f in QEventDispatcherGlib::processEvents (this=0xdbee70, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#21 0x00007f785282ebdf in QGuiEventDispatcherGlib::processEvents (this=0x2600650, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#22 0x00007f78551cef42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1567502800}) at kernel/qeventloop.cpp:149
#23 0x00007f78551cf314 in QEventLoop::exec (this=0x7fff5d6e3210, flags={i = 1567502880}) at kernel/qeventloop.cpp:201
#24 0x00007f78551d15e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#25 0x00007f7849153dc5 in kdemain () from /usr/lib/libkdeinit4_kate.so
#26 0x0000000000407215 in launch (argc=1, _name=0xdfde88 "kate", args=<value optimized out>, cwd=0x0, envc=1, envs=0xdfdea1 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3a1 "0") at /build/buildd/kde4libs-4.3.2/kinit/kinit.cpp:677
#27 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.2/kinit/kinit.cpp:1169
#28 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.2/kinit/kinit.cpp:1362
#29 0x0000000000408b26 in main (argc=2, argv=0x7fff5d6e50e8, envp=0x7fff5d6e5100) at /build/buildd/kde4libs-4.3.2/kinit/kinit.cpp:1793

Reported using DrKonqi