Navigation DVD Question (v. 7.1)

A friend of mine recently got an 08 Tundra and he brought over his nav dvd so we could update the firmware in my 06 Prius to get rid of the "I agree" button.

Everything went fine, you just pop the dvd in, load it up and the firmware auto-updates. My question is for those of you with the new disc, if you turn on your car and say, go to the Calendar or anything other than the nav system that used to require an "I agree", do you get taken to the map screen after the message goes away regardless of what you pressed previously?

When I try going to Calendar, etc. and I haven't used a feature that shows the warning message, I automatically get taken to the map. It's kind of annoying and I'm curious if it's because I used the disc from a Tundra or is this a common thing. The Tundra and Prius use the same nav system so I can't imagine they have different discs for each vehicle.