Frederic says freetype leaks the whole gzip stream when loading compressed 
fonts... I haven't verified with our package.

<fcrozat> --- freetype-2.1.3/src/gzip/ftgzip.c.pix        2003-02-24
23:23:58.000000000 +0100
<fcrozat> +++ freetype-2.1.3/src/gzip/ftgzip.c    2003-02-24 23:26:22.000000000
+0100
<fcrozat> @@ -276,6 +276,8 @@
<fcrozat>    {
<fcrozat>      z_stream*  zstream = &zip->zstream;
<fcrozat>  
<fcrozat> +    inflateEnd(zstream);
<fcrozat> +
<fcrozat>      /* clear the rest */
<fcrozat>      zstream->zalloc    = NULL;
<fcrozat>      zstream->zfree     = NULL;