Version:           3.50 (using KDE KDE 3.5.1)
Installed from:    SuSE RPMs
OS:                Linux

I am editing a single file, not a project. The file is an html and php mixture with some inline php. The editor appears to be very slow in responding to keystrokes, and I am not a fast typer. Quanta crashes completely and bombs out and just leaves the KDE crash handler report. I have read the other bugs and crashes similar to this one but they appear to be slightly different and none of them appear to have been resolved even though they say they have but this is maybe because you couldn't duplicate it.
Bug report 121280 appears to be the most similar.

The reports output is:-

System configuration startup check disabled.

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Using host libthread_db library "/lib/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1239996224 (LWP 6622)]
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[KCrash handler]
#6  0x08185b77 in Parser::staticMetaObject ()
#7  0x08185f88 in Parser::staticMetaObject ()
#8  0xb6b4db5d in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#9  0xb6b4e7bd in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#10 0xb6e86ec9 in QTimer::timeout () from /usr/lib/qt3/lib/libqt-mt.so.3
#11 0xb6b7139f in QTimer::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#12 0xb6aeec47 in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#13 0xb6aefa11 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#14 0xb71c38e3 in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#15 0xb6ae3dd5 in QEventLoop::activateTimers ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0xb6a9e710 in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#17 0xb6b05a78 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#18 0xb6b0590e in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#19 0xb6aee7ff in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0x080f41de in ?? ()
#21 0x083d62a0 in ?? ()
#22 0x00000000 in ?? ()