Possible bug: validator.w3.org gave me a "Software Error"

Hello there,

Trying to validate the source code of
http://www.gbv.de/vgm
validator.w3.org gave me the response:
---8<---
Software error:
This should not happen: '=' at /usr/share/perl5/HTTP/Headers/Util.pm line 49.
--->8---

I think he is right, that should not happen ;)

The problem is probably caused by a broken meta tag reading
---8<---
<meta http-equiv="content-type" content="="text/ht; charset=ISO-8859-1" >
--->8---

Regards
Mara

-- 
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