Has anyone tried this on an XG Home unit yet?

Please check the /log/applog.log while uploading. 

It for second show green dialog that firmware is validated but then imediately show red error dialog...

applog.log:

Oct 15 08:20:02 Checking new IPs of fqdn for mta
Oct 15 08:20:19 Request type = 1
Oct 15 08:20:19 apiInterface:versionsupported: true.
Oct 15 08:20:19 apiInterface:request mode -> 1646.
Oct 15 08:20:19 apiInterface:Current ver :::'1702.1'
Oct 15 08:20:19 apiInterface:entityjson::::::::HASH(0x9e73f80)
Oct 15 08:20:19 Info:: Transaction will not be rolled back for opcode u2d_validate. If any operation fails, request is part of multiple request :

Is there more log in your Logs? 

In which log file?

This is all what is generated when I start uploading file and when finish with error... If I repeat upload same entries are added to log...

Could you please open a new Thread to keep this clean, the other Guys will pick up your Issue und maybe can debug more on your Appliance.