Yes it is, but when it's blank do not reset it, wait for next time you start your car and it will be OK.
Didn't know there was a Nav software update. Rick - any idea what version your new software is, and does anyone know how to discover what the currently installed version is?<snip>
I just had the NAV software update (not the map CD update) installed last week, which is supposed to fix the intermittent blank map screens, but it did not fix the OBC display glitch.
Rick