[Bug 14917] New: Firefox won't render any font unless PANGO is disabled

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http://bugzilla.ubuntu.com/show_bug.cgi?id=14917
Ubuntu | mozilla-firefox

           Summary: Firefox won't render any font unless PANGO is disabled
           Product: Ubuntu
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: mozilla-firefox
        AssignedTo: debzilla at ubuntu.com
        ReportedBy: sebas at kde.nl
         QAContact: kubuntu-bugs at lists.ubuntu.com


Just upgraded to breezy, but Firefox did not show any font, not in the UI, not in the webpages. After some 
googling, I found that it may be related to PANGO. Disabling PANGO in /usr/bin/firefox helps, but the fonts 
don't look that smooth anymore. 
I changed the lines containing MOZ_ENABLE_PANGO to MOZ_DISABLE_PANGO and I get fonts again. 
 
The errors in the console shown when no fonts are rendered are: 
 
(Gecko:9446): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_n_channels: assertion `pixbuf != NULL' failed 
(Gecko:9446): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_bits_per_sample: assertion `pixbuf != NULL' failed 
(Gecko:9446): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `pixbuf != NULL' failed 
(Gecko:9446): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `pixbuf != NULL' failed 
(Gecko:9446): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_rowstride: assertion `pixbuf != NULL' failed 
(Gecko:9446): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed 
(Gecko:9446): Pango-CRITICAL **: pango_cairo_show_glyph_string: assertion `PANGO_IS_CAIRO_FONT (font)' 
failed 
 
(The last line is repeated quite often.)

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