Version:            (using KDE 3.5.9)
Installed from:    Ubuntu Packages
Compiler:          gcc 4.2 
OS:                Linux

Rosegarden crashed and caused the signal 11 (SIGSEGV)
the following is the backtrace of kde crash-handler:

***
[Thread debugging using libthread_db enabled]
[New Thread 0xb60cd940 (LWP 6006)]
(no debugging symbols found)
..
[KCrash handler]
#6  0xb6b5e54e in __dynamic_cast () from /usr/lib/libstdc++.so.6
#7  0x0836bc6f in KlearlookStyle::redrawHoverWidget ()
#8  0x0836d780 in KlearlookStyle::eventFilter ()
#9  0xb7a68492 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#10 0xb7a68510 in QObject::event () from /usr/lib/libqt-mt.so.3
#11 0xb7aa0d65 in QWidget::event () from /usr/lib/libqt-mt.so.3
#12 0xb79fec36 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#13 0xb7a00de5 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#14 0xb757e672 in KApplication::notify () from /usr/lib/libkdecore.so.4
#15 0xb798f301 in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#16 0xb798df8d in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#17 0xb798c12f in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#18 0xb79a3943 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#19 0xb7a19f90 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#20 0xb7a19c8e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#21 0xb7a007df in QApplication::exec () from /usr/lib/libqt-mt.so.3
#22 0x081bd067 in main ()
***

this happened when I was trying to configure midi devices telling the cpu to use my external audio device
thank you guys.. keep up the good work!