I have two TomTom devices, one GO and one PDA (Mio 168). Same map on both (875.3675).
According to the compability chart they are both running approved versions of map for the Navcore.
GO works fine.

But: I've noticed that some version of maps will get my PDA very slow scrolling and updating map in realtime while driving.
Have just upgraded from v870 and that map was running smooth, v875 is NOT (using the same SD-card).
How come? And what can I do about it? Anyone else having the same problem?