@mumble
what ISP you were using...First of all check your firewall settings.. This creates lots of issues.. it blocks cookies of some sites... windows firewall also doin like this..
im using bsnl, ve used sygate, mcafee, n even without firewall, but to no use at times, at times works fine.
even without firewall, now gmail not working in all the browsers. some plugin or runtime missing mayb. any suggestion?