I was just wondering. I have probably a half dozen map cards that I have made (personal data backups

) They are made using Garmin software, and used in a Garmin Astro. I have had one unit sent back to Garmin and there was no discussion about the map card, or it's source.
Slim,
Think of it more like this... Burn a copy of an audio CD, then go play it in a buddies truck. It's not distribution, because you own the original, and you are there using the copy of the original, you are not distributing anything. Have you ever heard of a copied CD damaging/ or voiding the warranty on a CD player? Me either.....
The map card does not change any parameters within the Garmin unit, like a truck tuner does. It just provides a datasource for the map program. I understand why a truck tuner voids the warranty...especially when Dodge voided the warranty on my silver dually... I don't understand Garmin's position on the matter, it's more like an audio CD than a truck tuner.
I will continue to take my chances, as I see their policy as an empty threat.