Yes, I am running the 2.01 firmware. Yes, I have factory reset the router. Yes, the settings were input by hand.
Are you running a B1 revision router? Because if you are not how can you possibly have any clue what you are talking about. I don't want to be rude but I'm tired of people trying to tell people in this thread "its your settings", "its your hardware", "its not supported", that is all bulls#!t. The exact same wireless settings on the A4 and A3 revisions worked perfect, but they don't work on the B1. So please, unless you have something constructive to add to the conversation other than suggesting that the B1 owners are doing something wrong, then please don't add anything.
Again, and I address D-Link, please fix this obvious issue. Its not a hardware issue, its a software issue and the software issue lies in the firmware. Its present in both 2.00 and 2.01.