Been running a B1 revision for a week now. I immediately upgraded the firmware to V2.02NA upon initial setup and then defaulted the router. From there I configured using my settings. Router has been working well so far except for the following problem I discovered yesterday.
Wireless client = Atheros 5004 a/b/g with Atheros client GUI and driver V5.3.0.85 (the latest I can find for the aging 5004x series)
I have the DIR-825 set to HIGH transmit power for both 2.4 and 5 Ghz bands. My Atheros client is showing the 5Ghz power setting at 3mw (AP set) even though I have it set to the maximum 50mw setting. Rebooting the PC and router have no effect and I cannot get the transmit power to report over 3mw. Worse is that my 5Ghz range is horrible. Way worse than my 5 year old Netgear 5Ghz AP this replaces.
From there I enter into the DIR-825 web config and confirm the power setting is set to HIGH for both 2.4 and 5Ghz. I proceed to set 5Ghz to LOW power and then SAVE. The web config refreshes the screen but it still indicates HIGH. I try again, but same result. Hmmm. I then reboot the router and try again. This time the power setting changed to LOW when I SAVED it. The Atheros client still shows 3mw (AP set).
I then switch the router power setting back to HIGH and SAVE. As a safety measure I reboot the router. When it comes back up my Atheros client shows 50mw and my 5Ghz range is vastly improved.
Seems to be OK now, but I think you have a firmware glitch in how the transmit power settings are stored and saved in V2.02NA.
One other thing for you to check....As a test I tried setting 2.4Ghz to low power. I get the same range on my 2x notebook PC's no mater whether its set to LOW, MEDIUM or HIGH. Range is excellent so I think the transmit power setting option isn't working as intended. Please check.
Sorry for the long ramble, but I wanted to make sure the Dlink engineers understand the problem exactly.