I am having the same problem, (at two different houses based in leeds)
I noticed yesterday that accessing subdomains on sites were failing, being tired I took no notice but after a friend was having the same problem I have investigated.
I am able to get to some sites (including subdomains other than
www.) however the site that I have found consistantly fails is support.microsoft.com, as with the previous poster messenger.hotmail.com also fails. I have also had problems with jobs.guardian.com and england.shelter.org.uk however these appear to be connecting now, these started to work after changing my dns servers from virgin to opendns
running a traceroute to support.microsoft.com gives the same an identical result to the previous poster however to messenger.hotmail.com gets a little further before failing.
interestingly enough I am able to access the support.microsoft.com at 65.54.166.122 but not the one at 207.46.248.248 (the ip my dns normally returns)
I am also fairly clueless as to why this is happening, so if anyone has suggestions ???
I have also checked the virgin service site, there is a red flag against the 'broadband' however I havent been able to find any notices.
I gave up calling them about problems years ago, this forum is much better
Cheers, Ajtag
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#Edit
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it could well be that
http://www.cableforum.co.uk/board/12...l#post34615999 is related...