diff -uNr shared-mime-info-0.18/freedesktop.org.xml.in shared-mime-info-0.18.patched/freedesktop.org.xml.in
--- shared-mime-info-0.18/freedesktop.org.xml.in	2006-06-19 14:57:25.000000000 +0200
+++ shared-mime-info-0.18.patched/freedesktop.org.xml.in	2006-08-03 19:59:54.000000000 +0200
@@ -1884,7 +1884,7 @@
     <_comment>MPEG-4 audio</_comment>
     <alias type="audio/x-m4a"/>
     <magic priority="50">
-      <match type="string" value="ftypM4A" offset="0"/>
+      <match type="string" value="ftypM4A" offset="4"/>
     </magic>
     <glob pattern="*.m4a"/>
   </mime-type>