I own an:
Linksys WMP600N PCI Wireless Adapter with Dual-Band
and have recently installed Ubuntu. It detects my home network (with about 3 bars), however, when I enter the wireless password (which I know to be correct from my Windows 7 install) it simply attempts to connect and then asks for the password again.
Hopefully this is a sign of something else that needs fixing, but what I do not know.
Does this sound like a card specific problem?