I seem to have a similar problem to other people but mine seems a bit strange.
DIR-655 - HW Verison: A2 - Firmware: 1.11
My main PC is running Windows Vista Enterprise and it wired to the DIR-655.
I have another PC running Windows XP Pro and using the DWA-552
A laptop and Xbox 360 running wireless G
Well the DIR-655 seems to reboot constantly when there are devices connected to it using Wireless. I've testing all sorts of Firmware (1.10, 1.11, 1.11EU, the Beta Code) and the router seems to keep rebooting.
When I look in the log I get an entry reading
"Wireless system with MAC address ************ disconnected for reason: AP maybe crash..."
The MAC address in this error belongs to the router.
I tried emailing D-Link but got nothing.
I've also gone through about 3 of these.
My original I had for about 6 months then this issue came up, Hardware Version A2 and FW 1.02.
Then when that went out I bought one A3 and 1.11. Same issue right out of the box.
Returned the A3 and found another A2 1.11 hoping that it was the hardware but no luck.
I guess I should also mention that using my laptop I don't see any other wireless networks in the area and we don't have a home phone, so no 2.4GHz phones are lying around =P
Any help would be appreciated ^_^