Wanted to add that I used a 4gig card with about 150 songs on it. It held all of North America and the songs. I checked my routes and favorites and could not find any changes or problems. Also switched Basecamp to the new maps. All seems to work as it should. Thanks again EASt.
My pleasure. You're giving me nothing but good news.
When I had the route issue it wouldn't even load it. Like I said it doesn't happen all the time but it has happened. If I recall it was when I went from the really old maps to the newer ones. 2009 or older to 2011. Maybe it was too much of a jump or the roads were updated with changes that screwed it up so it didn't line up anymore.
Your Old Routes On New Maps issue could be resolved, incidentally, using my guide (I think PCs use MapInstall too?). You can use MapInstall to go back and re-install older maps on your Zumo, if'n you want.