Mark Mitchell wrote:
> I'm running ver 1.5.0.3
I'm running 1.5.0.2

And I have Christian Marillat's archive in sources.list:
http://debian.video.free.fr/

And I've found that flashplayer-mozilla works better
for me than flashplugin-nonfree.

In general to debug nasty crashes you probably want to
carefully examine (or move away) any plugin files in
  /usr/lib/BROWSER/plugins/

In the case of firefox, I currently have, for example:

root at fastlap 49# pwd
/usr/lib/mozilla-firefox/plugins
root at fastlap 50# ls -l
total 0
lrwxrwxrwx 1 root root 37 2006-03-27 22:47 flashplayer.xpt -> ../../mozilla/plugins/flashplayer.xpt
lrwxrwxrwx 1 root root 39 2006-03-27 22:47 libflashplayer.so -> ../../mozilla/plugins/libflashplayer.so
lrwxrwxrwx 1 root root 39 2006-05-09 11:33 libjavaplugin.so -> /etc/alternatives/firefox-javaplugin.so
lrwxrwxrwx 1 root root 37 2006-05-31 17:55 libvlcplugin.so -> ../../mozilla/plugins/libvlcplugin.so
lrwxrwxrwx 1 root root 32 2006-04-10 11:17 nphelix.so -> ../../mozilla/plugins/nphelix.so
lrwxrwxrwx 1 root root 33 2006-04-10 11:17 nphelix.xpt -> ../../mozilla/plugins/nphelix.xpt
root at fastlap 51#

HTH,

--Tom