On a similar, but slightly different note....
I'm currently beta testing GameCenter, this is Gamespot's new application for online gaming - NTL customers have had to wait about 3 days longer than everyone else for a version that works with the Proxy servers - everyone else got in almost from day one - but the proxies caused a rewrite of the application before it would work - I participated in this by sending them logs.
Yes it is a beta, and yes, you could say that its bad programming - but once again its us, the customers, that suffer from these infernal proxies.
Not a day goes by it seems lately without the dam proxies causing problems
The pings I get are wonderful for online gaming - no complaints there - but I never imagined that the bloody proxies would start to interfere with online gaming applications !