I Have very similar problem
First error popup: Connect to 38.109.45.91 The server 38.109.45.91 at Packet Flip Private Proxies requires a username and password. Warning: This server is requesting that your username and password be sent in an insecure manner (basic authentication without a secure connection). Then if you try to cancel that popup, you get a full webpage with: ERROR Cache Access Denied -------------------------------------------------------------------------------- While trying to retrieve the URL: Google The following error was encountered: Cache Access Denied. Sorry, you are not currently allowed to request: http://www.google.com/from this cache until you have authenticated yourself. You need to use Netscape version 2.0 or greater, or Microsoft Internet Explorer 3.0, or an HTTP/1.1 compliant browser for this to work. Please contact the cache administrator if you have difficulties authenticating yourself or change your default password. -------------------------------------------------------------------------------- Generated Fri, 08 Aug 2008 19:52:37 GMT by kansascity01.datatrip.net (squid/2.6.STABLE21)