Version:           1.2.3 (using KDE KDE 3.1.4)
Installed from:    Slackware Packages
Compiler:          gcc 3.2.3 
OS:          Linux

konsole crashes after su command.the way of start application doesn't matter.

the backtrace is below:
(no debugging symbols found)...0x40f545c9 in waitpid ()
   from /lib/libpthread.so.0
#0  0x40f545c9 in waitpid () from /lib/libpthread.so.0
#1  0x4063f9ed in KCrash::defaultCrashHandler(int) ()
   from /opt/kde/lib/libkdecore.so.4
#2  0x40f52c45 in pthread_barrierattr_setpshared () from /lib/libpthread.so.0
#3  0x410b6988 in __libc_sigaction () from /lib/libc.so.6
#4  0x409448c5 in QPainter::drawTextItem(int, int, QTextItem const&, int) ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#5  0x409445e5 in QPainter::drawText(int, int, QString const&, int, int, QPainter::TextDirection) () from /usr/lib/qt/lib/libqt-mt.so.3
#6  0x4094420a in QPainter::drawText(int, int, QString const&, int, QPainter::TextDirection) () from /usr/lib/qt/lib/libqt-mt.so.3
#7  0x4143c172 in TEWidget::drawAttrStr(QPainter&, QRect, QString&, ca const*, bool, bool) () from /opt/kde/lib/konsole.so
#8  0x4143d05e in TEWidget::setImage(ca const*, int, int) ()
   from /opt/kde/lib/konsole.so
#9  0x4144bda9 in TEmulation::showBulk() () from /opt/kde/lib/konsole.so
#10 0x4144a626 in TEmulation::qt_invoke(int, QUObject*) ()
   from /opt/kde/lib/konsole.so
#11 0x41443894 in TEmuVt102::qt_invoke(int, QUObject*) ()
   from /opt/kde/lib/konsole.so
#12 0x409dae50 in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#13 0x409dac84 in QObject::activate_signal(int) ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#14 0x40cf4a3b in QTimer::timeout() () from /usr/lib/qt/lib/libqt-mt.so.3
#15 0x409fc242 in QTimer::event(QEvent*) () from /usr/lib/qt/lib/libqt-mt.so.3
#16 0x40980035 in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#17 0x4097f6eb in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#18 0x405c2c89 in KApplication::notify(QObject*, QEvent*) ()
   from /opt/kde/lib/libkdecore.so.4
#19 0x4096fa6b in QEventLoop::activateTimers() ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#20 0x4092dbb4 in QEventLoop::processEvents(unsigned) ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#21 0x40993276 in QEventLoop::enterLoop() () from /usr/lib/qt/lib/libqt-mt.so.3
#22 0x40993118 in QEventLoop::exec() () from /usr/lib/qt/lib/libqt-mt.so.3
#23 0x40980281 in QApplication::exec() () from /usr/lib/qt/lib/libqt-mt.so.3
#24 0x41416cf2 in main () from /opt/kde/lib/konsole.so
#25 0x0804cbe1 in strcpy ()
#26 0x0804da09 in strcpy ()
#27 0x0804de8c in strcpy ()
#28 0x0804ec3a in strcpy ()
#29 0x410a2d06 in __libc_start_main () from /lib/libc.so.6
with regards
ireo