I use 3.0 based on RH8. I see you link to the RH9 rpm. Was this a Redhat 8 problem perhaps, fixed in Redhat 9? Then again, perhaps upgrading to 3.1.1 might do the trick.
It has been ages since I've seen a crash caused by flash. Be sure that you have the latest/greatest version:
http://macromedia.mplug.org/apt/redhat/9/RPMS.macromedia/flash-plugin-6.0.79-1.i386.rpm