abrt version: 1.1.13
architecture: i686
Attached file: backtrace
cmdline: /usr/bin/gtk-gnash -u http://supercollider.sourceforge.net/sc140_files/xspf_player.swf?playlist_url=/sc140_files/sc140.xspf&autoload=true&repeat_playlist=true -U http://supercollider.sourceforge.net/sc140/ -x 113246245 -j 750 -k 330 -F 15:16 -P bgcolor=#E6E6E6 -P height=330 -P src=/sc140_files/xspf_player.swf?playlist_url=/sc140_files/sc140.xspf&autoload=true&repeat_playlist=true -P type=application/x-shockwave-flash -P width=750 -
comment: sc140 website: http://supercollider.sourceforge.net/sc140/
component: gnash
crash_function: raise
executable: /usr/bin/gtk-gnash
kernel: 2.6.34.7-61.fc13.i686.PAE
package: gnash-1:0.8.8-4.fc13
rating: 4
reason: Process /usr/bin/gtk-gnash was killed by signal 6 (SIGABRT)
release: Fedora release 13 (Goddard)
time: 1289776866
uid: 1000

How to reproduce
-----
1.) Opened the sc140 website in one tab of Firefox.
2.) Pause the sc140 player.
3.) Open another Flash video in another tab of the same window in Firefox.  This happens with multiple other Flash things at this step.