Validation error for valid site

I would like to report an issue with validator, which does fails when validating following site:

http://validator.w3.org/check?uri=http%3A%2F%2Fgoout.cz%2Fcs%2Ffotoreporty%2F#fatal-errors

It says:

The error was: Can't gunzip content: Header Error: Minimum header size is 10 bytes

The site is publicly available and working. On the other hand this site validates correctly:

http://validator.w3.org/check?uri=http%3A%2F%2Fgoout.cz%2Fcs%2F

I tried to debug the gzip header, but it seems to me correct:

$ curl http://goout.cz/cs/ | head -1 | hexdump | head -1 0000000 1f 8b 08 00 00 00 00 00 00 00 ed 5d cd 73 db 38 $ curl http://goout.cz/cs/fotoreporty/ | head -1 | hexdump | head -1 0000000 1f 8b 08 00 00 00 00 00 00 00 ed 7d cf 73 e3 46

Please let me know if I am doing anything wrong.

Thanks,

Vojtěch Knyttl | GoOut

knyttl@goout.cz
+420 607 008 510
http://goout.cz