Comment 9 for bug 471660

Might be your having a completely different problem i just experienced:

Something in the WPA encryption wrapper is not working and not able to handle WPA2 with D-Link DWL-G122 USB wireless dongle. If possible, try changing the encryption of your router to "WPA (TKIP)" (instead of WPA/WPA2).

Had the same problem and was able to connect by changing to pure WPA encryption.

To see if your problem is the same try manually assigning IP address, gateway and a working dns server.
System should state "connected", print out correct routes, but network still won't work, then you probably have (had) the same as me.

Eithet D-Link DWL-G122 USB wireless dongle simply does not support WPA2, or the wrapper code gets confuses when setting up WPA encryption on this chipset.

This still needs a fix! as I will probably run into problems with other clients if they only support WPA2 (which is now disabled on my router :(

Regards,
Sven