Other people don't seem to have this problem. If I telnet in to i.imgur.com it disconnects me even for very simple requests.
bash-4.0$ host i.imgur.com
i.imgur.com is an alias for wpc.4220.edgecastcdn.net.
wpc.4220.edgecastcdn.net is an alias for gs1.wpc.edgecastcdn.net.
gs1.wpc.edgecastcdn.net has address 72.21.81.253
bash-4.0$ telnet i.imgur.com 80
Trying 72.21.81.253...
Connected to i.imgur.com.
Escape character is '^]'.
GET / HTTP/1.0
Host: i.imgur.com
Connection closed by foreign host.
bash-4.0$
Any hints?