Quote Originally Posted by akchee View Post
Warning:

The update of eTrex 30x to firmware 2.10 may cause authentication failure of maps.

I did an update recently, and the maps that were already on the device worked perfectly.

Just added a new map today, and it failed to authenticate map.

Do not upgrade. Sorry for above misinformation.
Weird because if something had changed in firmware protection all your "free" maps should give error in gps.
Check better.