problems with php based version on heise.de/software

[SSilence]

Some pages doesn't work with the php based version. Decoding error (gzip/chunked??).

Example:
http://www.heise.de/download/neuzugaenge-50000311000/?f=15ews

Response Header heise.de:

Connection:close
Content-Encoding:gzip
Content-Type:text/html; charset=UTF-8
Date:Tue, 20 Nov 2012 17:28:08 GMT
Server:Apache
Set-Cookie:Softwareverzeichnis_parameter=neuzugaenge-50000311000%2F%26%261%2C5%26; domain=.heise.de; path=/download/; expires=Mon, 18-Feb-2013 17:28:09 GMT
Transfer-Encoding:chunked
Vary:Accept-Encoding