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From: Keith Seyffarth <weif@weif.net>
To: Rob Farmer <rfarmer@predatorlabs.net>
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	(message from Rob Farmer on Thu, 20 Jan 2011 17:05:17 -0800)
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Date: Thu, 20 Jan 2011 19:27:30 -0700
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Cc: freebsd-questions@freebsd.org
Subject: Re: use of menus crashes Firefox?
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> So have you tried this?
>
> ======================================================================
>
> Firefox 3.6 and HTML5
>
> Certain functions used to display HTML5 elements need the sem module.
>
> If your Firefox crashes with the following message while viewing a
> HTML5 page:
> "Bad system call (core dumped)"
>
> you need to load the sem module (kldload sem).
>
> To load sem on every boot put the following into your
> /boot/loader.conf:
> sem_load="YES"
>
> ======================================================================

I hadn't, but the issues I'm seeing don't seem to be related to HTML
5. It also persists to Firefox 3.5 in addition to 3.6. I would expect
that if clicking on a menu in Firefox 3.6 required this. I did make that
change to see if it helps at some point in the future... Right now I'm
updating /usr/src to try a new kernel.

Keith