Ah, it looks that Hijack is not escaping double quotes when displaying the tag fid:

<?xml version="1.0" encoding="iso-8859-1"?>
<?xml-stylesheet type="text/xsl" href="/default.xsl"?>
<item stylesheet="/default.xsl" host="192.168.2.68" allow_files="1" allow_commands="1" type="tune" tagfid="16851" fid="16850" length="3022385" year="1997" options="" genre="Pop" title="Schoolchildren Singing "Particle Man"" artist="They Might Be Giants" source="Then: The Earlier Years" comment="" tracknr="72" bitrate="fs192" samplerate="44100" codec="mp3" duration="2:05" offset="1666"/>

Quotes must be represented in XML by &quot; or some other method.

I'll send a PM to mlord and see if he can escape these. I can't use the normal method to parse the output since it is not valid XML.