Just received my brand new Linksys EA8500.
I booted it and it automatically did firmware upgrade to 188.8.131.52832 (I didn't even had a choice of saying "no").
The OEM GUI looks nice and it seems to have a nice feature set, but I want the good old OpenWRT!
So, I was following the "OEM Easy installation procedure" (just loading the OpenWRT file in the GUI) and got this error (attached image).
Any idea how to overcome this?