Mozilla 1.3 about:plugins->crash

[Ross Boylan <RossBoylan@stanfordalumni.org>]

I just installed mozilla 1.3.1-3, built from Debian source on a mostly
testing system with  gcc3.3.

Whenever I go to help about plug-ins, mozilla crashes.  It seems to
work OK apart from that, though I haven't visited pages with plugins.

I have installed http://jopa.studentenweb.org ./ j2re1.4 1.4.1-6,
after having installed the blackdown 1.4 (which I gather was built
with an earlier gcc).

I also have some other plugins (e.g., realplayer) which I guess were
built with an earlier gcc (although realplayer seems to be at the most
current version):
$ ls /usr/lib/mozilla/plugins/
flash_linux      javaplugin_oji.so  libnullplugin.so  raclass.zip  
ShockwaveFlash.class flashplayer.xpt  libflashplayer.so  nppdf.so
rpnp.so

raclass.zip and rpnp.so are symlinks pointing to themselves.  I tried
deleting them; it didn't help.

Is this expected behavior if some of the plugins are built with an
incompatible gcc, or is something else going on?

(In case you're wondering, I built from source a few weeks ago; that's
why the version is a little old).

Thanks.