I have to second this, I have had the DIR-825 from its very beginning, and have been through every update of the shareport software, and this last version is the worst ever.
The very firts one worked without problems!!!
The second one was unreliable it would connect 70% of the time
the the third one was a little bit better but still unreliable,
The current 3.0 is totally unreliable, it will connect may be 40% of the time
Now for the specifics. I have it installed on 2 different machines, a desktop with XP pro SP2 32 bits, and a laptop with Windows 7 64 bits.
Installation is fine configuration and initial connection is fine both in permanent connection or auto connection when requesting to print (my most used configuration).
But when like me you print rarely like a couple of times a week, you never know if it will actually be able to connect. Sometimes it work, Often it does not.
When it does not, the way to always solve the problem, is to power cycle the router. Off for 10seconds, then ON, wait until all networks are up again, and then it works fine. When it works I ahve no issue, no connection drop, everything is perfect both in printing mode and in scanning mode for my multifunction printer Canon MP830.
I bought this router for the sole purpose of Shareport, I must say it has been nothing but a Nightmare.