Accessing wireless with Vista and Intel wireless

We are having some issues with browsing the Internet via wireless on Vista

computers. The computer connects to the access points and is getting a valid

IP address, but isn't able to browse the Internet. OS: Vista (doesn't matter

what version) APs: 3Com Wireless Cards: Intel (different versions) PC

Make: Any. On "home networks" everything works fine. We found a "work around"

by installing the latest XP drivers for the wireless cards on Vista machines.

Everything works just fine then. Does anyone have any ideas what the source

of the issue might be? Thanks for any information.

Chris