http://vax.linsze.hu/ validation error

Hello,

I wonder if you are aware of a present problem I have encountered.

This page gives a bizarre error:
http://vax.linsze.hu/

===============================
This page is not Valid !

Below are the results of attempting to parse this document with an SGML 
parser.
   1.

      Line 1, column 0: end of document in prolog
======================


Any ideas?

Kind regards

JG


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