Doesn't exactly bode ill, AA, but I should have mentioned it before. I bought the D-Link 520+ and 650+ at the same time but opened the 650+ first. The CD for the 650+ was Version 2.20 and I went ahead and installed it. It didn't work so I downloaded Version 3.05 fom:
D-Link ftp Site - Wireless
It worked fine with the Router (604+).
Then I opened the 520+ box and found that it already included the updated Version 3.03!
These two items include the same CD but downloading the update is no hardship at 2.2MB.