Hi,
there is a different. In 7.460 you get a status code 302 and in 7.450 you get a status code 301.
302 means action move. In most cases for example if you get forwarded from mail.yahoo.com to another url.
301 means that forwarding to another url is permanent
wou will find a good explanation on
Status codes in HTTP
But both error codes are normal and should not drop any traffic. If I try to browse your url through the proxy with 7.460 it works without problems. Could you maybe send us some screenshots of your settings?
greetings
Andreas