I updated to the pre-release 1.03.40, it solved my problem that D-LINK WDA-125 Rev A2 not working issue (previous firmware version only support Rev A1). I am happy with this.
But I found (one time) when I try to play a video file, a message come out say that it is not supported format and cannot be played, I know it is supported as I played it before. So I turn off the device and turn on again, it all plays well. Kind of strange, maybe a small bug with the new firmware version.