Just tried something, and got a positive response.
Instead of using my shorcut in 'favourites' I did a search for the website on Google.
When it came up, I clicked on it, and got straight through.
It looks like the 'favourites' addresses are getting corrupted, or something.
I'll now try with other sites.
Still doesn't explain, why I can get SOME pages on PC Advisor, and not others, from a link on the home page though. Is it the TYPE of address?