diff -upU8 thunderbird-3.0/mozilla/gfx/thebes/src/gfxPangoFonts.cpp.pango-fix thunderbird-3.0/mozilla/gfx/thebes/src/gfxPangoFonts.cpp
--- thunderbird-3.0/mozilla/gfx/thebes/src/gfxPangoFonts.cpp.pango-fix	2009-03-03 12:04:16.000000000 +0100
+++ thunderbird-3.0/mozilla/gfx/thebes/src/gfxPangoFonts.cpp	2009-03-03 12:05:37.000000000 +0100
@@ -1798,22 +1798,21 @@ gfx_pango_font_map_context_substitute(Pa
     double size = pango_font_description_get_size(desc) / FLOAT_PANGO_SCALE;
     gfxPangoFontGroup *fontGroup = GetFontGroup(context);
     PRBool usePrinterFont = fontGroup && fontGroup->GetStyle()->printerFont;
     PrepareSortPattern(pattern, size, 1.0, usePrinterFont);
 }
 
 static PangoFcFont *
 gfx_pango_font_map_create_font(PangoFcFontMap *fontmap,
-                               PangoContext *context,
-                               const PangoFontDescription *desc,
-                               FcPattern *pattern)
+                               PangoFcFontKey *fontkey)
 {
+    const FcPattern *p_pattern = pango_fc_font_key_get_pattern(fontkey);
     return PANGO_FC_FONT(g_object_new(GFX_TYPE_PANGO_FC_FONT,
-                                      "pattern", pattern, NULL));
+                                      "pattern", p_pattern, NULL));
 }
 
 static void
 gfx_pango_font_map_class_init(gfxPangoFontMapClass *klass)
 {
     // inherit GObjectClass::finalize from parent as this class adds no data.
 
     PangoFontMapClass *fontmap_class = PANGO_FONT_MAP_CLASS (klass);
@@ -1823,19 +1822,18 @@ gfx_pango_font_map_class_init(gfxPangoFo
     fontmap_class->load_fontset = gfx_pango_font_map_load_fontset;
     // inherit fontmap_class->shape_engine_type from PangoFcFontMap
 
     PangoFcFontMapClass *fcfontmap_class = PANGO_FC_FONT_MAP_CLASS (klass);
     fcfontmap_class->get_resolution = gfx_pango_font_map_get_resolution;
     // context_key_* virtual functions are only necessary if we want to
     // dynamically respond to changes in the screen cairo_font_options_t.
 
-    // context_substitute and get_font are not likely to be used but
+    // get_font are not likely to be used but
     //   implemented because the class makes them available.
-    fcfontmap_class->context_substitute = gfx_pango_font_map_context_substitute;
     fcfontmap_class->create_font = gfx_pango_font_map_create_font;
 }
 
 /**
  ** gfxPangoFontGroup
  **/
 
 struct FamilyCallbackData {