Thanks for your thought, phoenixfire, but the IPs are set by my router acting as a DHCP server, and are fine - no conflicts.
Tried disabling IPV6, Lenard; no difference. It's crazy - the same machine, with the same hardware, using the same browser (Mozilla), on the same home network, was fine running XP. Some pages won't load at all (
www.google.co.uk for instance!!!), and even when a page does load, it never completes - ie I never get 'Done' in the bottom left corner of the browser. Not a good intro to Linux...