yes, done that, thanks. Doesn't seem to make any difference. Obviously not an ipv6 issue. I really don't know what this could be. It happened specifically after upgrading from kernel 2.6.15. When I roled back to 2.6.15 it was fine.
Do you know if anything specifically changed that might cause this?
You can also try this as root. sysctl -w net.ipv4.tcp_window_scaling=0. This is only a fix for certain sites that take a long time to load. If you are having problems with all (or most) sites this may not help (but won't hurt), and when you reboot it's gone so you need to do it again or put it in a startup script.
I don't remember who to thank for this
I wanted to proclaim myself "The Typo King" but there's way too much competion. :p