I just moved back to the 1.01 version listed on the Canadian site as some wireless devices would just keep dropping the connection (it would continually connect, then several seconds later disconnect). It didn't happen all the time or to all wireless devices, just seemed to pick a device for the day to have the problem.
I have the same issue, after more than 24 hours some wireless devices drop the connection, and reconnect again, endlessly. A router restart fixes the problem, but I cannot restart every day, and I don't think it is a router issue, just a software one. This was with 1.02b13. I contacted D-Link and they sent me a newer version of the firmware (I am from Europe btw), which seemed to work fine, but I couldn't use it as I was not able to see the external HDD connected to the USB port (in the router interface or with my TV on wifi).
No more responses from DLINK so far, and I am running 1.01b09 for three days now with no problems, only the popup (new firmware available) when accessing the router interface. Too bad, copying speed from my computer to the attached external HDD seemed to increase (30+ MB/s) with the newer fw. I still think 30+ MB/s is a little slow.