The site http://www.vbtelecom.nl is redirecting to about:blank. How bizarre! And it works in both Firefox 3.6.10 and Safari 5.0.2:
$ telnet www.vbtelecom.nl 80
Trying 77.95.248.16...
Connected to redirect.server.eu.
Escape character is '^]'.
GET / HTTP/1.1
Host: www.vbtelecom.nl
HTTP/1.1 302 Found
Date: Tue, 19 Oct 2010 19:49:19 GMT
Server: Apache/2.2.9 (Debian) PHP/5.2.6-1+lenny6 with Suhosin-Patch
X-Powered-By: PHP/5.2.6-1+lenny6
Location: about:blank
Vary: Accept-Encoding
Content-Length: 0
Content-Type: text/html
Connection closed by foreign host.
znerd 