Fontconfig - May 2011 - Inconsistent state after font upgrade

I upgraded my DejaVu fonts (http://dejavu-fonts.org/) from version
2.32 to 2.33, and I didn''t bother to restart any of my programs
because such an action didn''t even ocurr to me as being necessary.

However, I think that this upgrade caused an inconsistent state for at
least Firefox 4.0.1, which I assume uses fontconfig to manage fonts.
The result was that at least a few of the variable-width serif
ligatures were being rendered with the wrong glyphs (presumably
because glyph locations had changed due to the upgrade); see here for
a screencast of the problem:

  http://www.youtube.com/watch?v=zZoK4BhZaCs

After running a new instance of Firefox, the problem seemed to be
resolved, corroborating this hypothesis.

Is this a fontconfig weakness that could be resolved?

Sincerely,
Michael Witten

Le mercredi 11 mai 2011 ? 17:11 +0000, Michael Witten a ?crit :
> Is this a fontconfig weakness that could be resolved?
This is a bug in the firefox code. Other fontconfig-using apps have no
problems with font updates.

-- 
Nicolas Mailhot

On Wed, May 11, 2011 at 17:24, Nicolas Mailhot
<nicolas.mailhot at laposte.net> wrote:
>
> This is a bug in the firefox code.
Who would have thought...

Thanks.