Althought the changelog doesn't mention any crash fixes, compiling the daily version of mplayerplug-in fixed the crash for me.
My package can be found here: http://haar.student.utwente.nl/~julius/debs/jaunty/mozilla-mplayer_3.55+daily20090524-1.0ubuntu1_i386.deb
It works for me now with Firefox 3.0. (For some reason Firefox 3.5 started segfaulting on launch now.)
Althought the changelog doesn't mention any crash fixes, compiling the daily version of mplayerplug-in fixed the crash for me.
My package can be found here: haar.student. utwente. nl/~julius/ debs/jaunty/ mozilla- mplayer_ 3.55+daily20090 524-1.0ubuntu1_ i386.deb
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It works for me now with Firefox 3.0. (For some reason Firefox 3.5 started segfaulting on launch now.)