Well the problem is probably to do with the WCCP (Web Cache Control Protocol), this is the redirection that is put on the outbound interface of the t2core routers toward the bb routers or the inbound interface from the t2cam or dam routers. But you'r probably just reporting that the problem only occurs when you don't specify a cache
- its probably redirecting you through a different Cache each time or something silly.....
Have you tried a different browser (just to cover all possilibities?)