--- src/base/ftsynth.c.old	2006-11-07 10:38:57.000000000 +0100
+++ src/base/ftsynth.c	2008-12-12 14:31:53.000000000 +0100
@@ -83,6 +83,10 @@
       if ( error )
         return error;
 
+      error = FT_Bitmap_Done( slot->library, &slot->bitmap );
+      if ( error )
+        return error;
+
       slot->bitmap = bitmap;
       slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
     }