Merlin just want to point out, that been using your firmware for the last year or so and its an amazing mod, i really like it.
In the 378.56 BETA 1, in AC66U any USB disk connected were UNMOUNTED. No matter what i would do, format, reset settings, disk would still be unmounted. Downgraded back to 378.55 and disk are mounted and fully functional.
I can't test Beta 2 because i'm running a backup server on my house and i can't reset the router, anyway. Just registered to point out the bug and if is already solved then thanks a lot!
Juan