Just received my AR300M from Amazon. Really impressed with the little beast BUT:
Every time it powers off or I issue a reboot via the GUI it forgets all the settings.
I tried iphone power supply and ipad power supply and did a factory reset but none of these fixes it.
It is booting to standard Frimware v2.25 from NAND.
I am aware of data loss issues from NAND booted firmware in v2.20 but I am running 2.25.