Version:            (using KDE 4.1.4)
OS:                Linux
Installed from:    Ubuntu Packages

Running Kate and an R session in the konsole part. I was editing the text and nothing was running in the konsole. when scrolling down to the end of the text (with mouse), then Kate crashed. A similar crash had happened before scrolling down with arrow keys.
See the bug report.
Application: Kate (kate), signal SIGABRT
0x00007f89145836e1 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 8732)]

Thread 2 (Thread 0x40b69950 (LWP 10705)):
#0  0x00007f89145ba4b2 in select () from /lib/libc.so.6
#1  0x00007f8912f96006 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f8912ecd362 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f89102d93ea in start_thread () from /lib/libpthread.so.0
#4  0x00007f89145c1cbd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8914c406f0 (LWP 8732)):
[KCrash Handler]
#5  0x00007f891450e015 in raise () from /lib/libc.so.6
#6  0x00007f891450fb83 in abort () from /lib/libc.so.6
#7  0x00007f8912ec56b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f8912ec57fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f8909aca922 in KateSmartManager::groupForLine (this=<value optimized out>, line=<value optimized out>) at /build/buildd/kde4libs-4.1.4/kate/smart/katesmartmanager.cpp:184
#10 0x00007f8909ac5696 in KateSmartCursor::setPositionInternal (this=0x26ffa78, pos=@0x7fff1cc6fce0, internal=false) at /build/buildd/kde4libs-4.1.4/kate/smart/katesmartcursor.cpp:154
#11 0x00007f8909ac6187 in KateSmartCursor::setPosition (this=0x26ffa78, pos=@0x7fff1cc6fce0) at /build/buildd/kde4libs-4.1.4/kate/smart/katesmartcursor.cpp:377
#12 0x00007f8909b14dbe in KateViewInternal::updateCursor (this=0x26ff9f0, newCursor=@0x7fff1cc6fce0, force=<value optimized out>, center=false, calledExternally=false)
    at /build/buildd/kde4libs-4.1.4/kate/smart/katesmartcursor.h:69
#13 0x00007f8909b19429 in KateViewInternal::placeCursor (this=0x26ff9f0, p=<value optimized out>, keepSelection=false, updateSelection=true)
    at /build/buildd/kde4libs-4.1.4/kate/view/kateviewinternal.cpp:2055
#14 0x00007f8909b1a8b2 in KateViewInternal::mousePressEvent (this=0x26ff9f0, e=0x7fff1cc704f0) at /build/buildd/kde4libs-4.1.4/kate/view/kateviewinternal.cpp:2458
#15 0x00007f891391330f in QWidget::event () from /usr/lib/libQtGui.so.4
#16 0x00007f89138c0c3d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#17 0x00007f89138c922a in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0x00007f891169313b in KApplication::notify (this=0x7fff1cc713b0, receiver=0x26ff9f0, event=0x7fff1cc704f0) at /build/buildd/kde4libs-4.1.4/kdeui/kernel/kapplication.cpp:311
#19 0x00007f8912fb5d61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#20 0x00007f89138c85c8 in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#21 0x00007f891392cbe9 in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007f891392b607 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#23 0x00007f89139532c4 in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007f8910527d3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0x00007f891052b50d in ?? () from /usr/lib/libglib-2.0.so.0
#26 0x00007f891052b6cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0x00007f8912fde15f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#28 0x00007f8913952a6f in ?? () from /usr/lib/libQtGui.so.4
#29 0x00007f8912fb4682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#30 0x00007f8912fb480d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#31 0x00007f8912fb6cbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#32 0x00007f8914851d15 in kdemain (argc=1, argv=0x7fff1cc72588) at /build/buildd/kdesdk-4.1.4/kate/app/katemain.cpp:252
#33 0x00007f89144f9466 in __libc_start_main () from /lib/libc.so.6
#34 0x0000000000400659 in _start ()