Dude, The problem is at XXX Webhosting. Look here:
Test 1:
$ telnet wantboobs.com 80
Trying 216.131.81.198...
Connected to exchng-198.ds160.reliablehosting.com.
Escape character is '^]'.
HEAD /images5/wb1-6.jpg HTTP/1.1
Host: wantboobs.com
Referer: http://wantboobs.com
Connection closed by foreign host.
Test 2:
$ telnet wantboobs.com 80
Trying 216.131.81.198...
Connected to exchng-198.ds160.reliablehosting.com.
Escape character is '^]'.
HEAD /images5/wb1-6.jpg HTTP/1.1
Host: wantboobs.com
Referer: http://wantboobs.com/
HTTP/1.1 200 OK
It only works when there's a trailing slash in the Referer. Take a look in your htaccess or if you use another type of hotlink protection.