I've had the DIR-825 for a little more than a month now, and this is the only issue I have found that is actually an "ISSUE" for me.  The bloody thing won't keep time.  I have to set the time about once every 3 days... I have tried the NTP servers, I have tried doing it from my system time... nothing works.
My version stuff is below
    Hardware Version: B1       Firmware Version: 2.02NA