I dual booted my xp, installing linux mint, My connection is so bad on my linux mint, but good on windows 7 and windows xp and on mobile.
speedtest.net results on my linux mint 12
Ping: 200ms
Download speed: 4.08 Mbps
Upload speed: 0.08 Mbps
All the websites are opening fast on my mint but some of them are not opening the right way, and some websites are not opening at all. I haven't been able to open SO this week. Now SO is opening as normal
This is how github is opening

This is how youtube is opening:

Do you know why I'm having this error? I don't have any antivirus, i am using default firewall settings, i have apache python django php ruby java and some stuff installed. But i don't think this is the cause.
I tried google chrome and firefox and this issue is on both browsers. I didn't have this issue last month. any guess? My isp cannot help me coz he's a windows guy and he's only responsible for fixing networking errors, not personal problems.