firefox 3.5 exited on signal 12

[Unga]

Hi all

I have installed firefox 3.5,1 port (make install clean) on FreeBSD 7.2 i386. Firefox crashes when it try to display Theora video (http://www-cs-faculty.stanford.edu/~nick/theora-soccer/) with following message on logs:
kernel: pid 1106 (firefox-bin), uid 1001: exited on signal 12 (core dumped)

Do others experience it? Is there a fix for this?

Best regards
Unga