I have posted the following below on the Ubuntu Forums but have not got a satisfactory answer yet. My problem is as follows:

I have installed Xubuntu on my machine to test a setup I want to to for my in-laws. Everything went well until I realised I have a problem loading some pages on Firefox. Those pages are:

http://www.skype.com

and funnily enough

http://www.distrowatch.com

There is no error message but they are just stuck on loading and finally timing out. I have then downloaded Opera and I am showing the same problem. A bit of research showed it could be a IPV6 issue. I therefore disabled ipv6 in about:config and also /etc/modprobe.d/aliases - 'alias net-pf-10 ipv6' to alias 'net-pf-10 off ipv6'. No change - still can't get those pages loaded. Any help would be appreciated.

Thanks!

http://ubuntuforums.org/showthread.php?t=1029461

Hi,

Do you use NetWorkManager 0.7 ?
there seems to be a bug.

Try to change the mtu
sudo /sbin/ifconfig wlan0 mtu 1492

If it works, make the changes permanent in networkmanager, or install wicd

repo - thanks. It was NetWorkManager 0.7. The ifconfig solution did not work but installing and using wicd worked a treat! Thanks!