Bug#543429: Iceweasel: Cairo Assertion `!unscaled->from_face' failed. Aborted

[Mike Hommey]

On Sat, Dec 19, 2009 at 04:06:54PM -0800, Marc J. Driftmeyer wrote:
> I've been receiving this error since lenny. It probably has to do
> with certain font faces that if the family isn't correctly
> referencing ttf, otf or pfa/pfb formats cairo isn't failing
> gracefully and thus brings down Firefox.

Would you mind trying with a rebuild of xulrunner-1.9.1 after removing the
following line in debian/mozconfig:
ac_add_options --enable-system-cairo

Thanks

Mike