Unable to View certain sites with Safari/Firefox

Please help if you can:

Here's the deal.

I have a macbook. I am on the internet and can receive mail, surf the web on certain sites. But cannot go on to sites like Amazon, the Apple store (although I can go on to the apple site), BBC, The Guardian and many more. I get
Safari can’t open the page “http://www.guardian.co.uk/” because Safari can’t connect to the server “www.guardian.co.uk”.
Same on firefox, and same on any other internet connection. Tried other computers on same internet connection and they are fine.
I have run antivirus - and checked for the Mac trojan that changes the DNS...nothing...
Can't work it out...this suddenly started happening on Monday. I have even connected to a VPN and changed my IP address and still the same.
So,
It isn't the ISP, it isn't the browser, it isn't the DNS settings as far as I can see, it isn't the Firewall, it isn't antivirus software....I am not getting any porn pop ups or being redirected...all that is happening is that my internet is limited...

Any one have any ideas?

thanks for your help in advance

Justin

I am having the same problem
I connect and then it goes to a white screen and It reads at the bottom Google-analytics...

Justin,

Well, it appears that the Guardian site does have some kind of problem. I do get an error with the first link you provided, but when I click on a link on that page, e.g., News, then everything works well. The second URL you wrote (without the http) does seem to be a phishing URL that goes to another site. That is not the Guardian URL though it appears to be the same. If you just put your mouse on that second URL you can see it's another location.

Specs Mac G4, 10.4.11, 350Mhz, 832 Mb SDRAM

I have the exact same problem... but it isn't one or two sites.. it's LOTS. I've tried to reset the DNS, I've tried different browsers.. I've emptied the cache and browsing history. I've contacted my ISP and had them look into it.. the line is fine, the modem is fine.. the speed is fine. I can't even view ehow.com. Yahoo and Google are fine but a lot of sites I need for research and work just refuse to load and I get the same message... "blah blah ..the server is not responding". I've done dnlookups and the one thing I have noticed is that the sites usually come back as "non-authoritative". Not sure what that means.

I have noticed that the latency is very high. My traceroutes can go on and on and on.

I HAVE to find a way to fix this... I use the computer to make money and if I can't load the sites I need to it's just a big paintbrush and calculator.

Anyone have any solutions or ideas for this? Thanks!

I'm using:

OS 10.6.8
Intego security (full pack of services)
Little Snitch
Safari
Comcast Blast cable

I can open Huffington Post & read the whole front page, including teasers, but when I try to open an article to read all of it the little wheel turns for minutes, sometimes an hour, before the page opens. Can't open using Opera engine, either. A friend on a Mac in the UK has the same problem.

BBC News will not open. The UK's Independent Newspaper will not open. Same for Bloomberg News, etc., etc. --- & this seems to be happening to more sites weekly.

Thanks in advance for any insights!