Many people post on the forum that they are having issues with particular sites and proxy servers, so this post is to give information regarding the sites that most commonly have problems.
Problem Sites:
The ones I encountered most whilst working at ntl were:
Yahoo- In particular yahoo groups
Hotmail- sometimes no access at all, sometimes errors when trying to get to particular folders
Ebuyer- usually no access at all to the site.
Resolution:
http://www.cableforum.co.uk/board/article.php?c=16
There are five articles here regarding proxy servers- detailing how to find out which proxy range you use by default, how to change your proxy, and a list of ntl proxy servers.
Most importantly-
If you do not report the problem to ntl they will not know about it and therefore cannot deal with it! I would suggest that you do not bother reporting issues with sites listed above, but other sites it is worth reporting. Perhaps members can post issues in this thread as well so others can see problem sites?
Contact numbers for ntl's technical support are here:
http://www.cableforum.co.uk/board/article.php?a=9