Basically, In Map settings, you can turn on/off breadcrumbs. In original MFT, white dots (breadcrumbs) would appear on ALL roads driven, AND STAY THERE! (Very useful for backtracking in unfamiliar territory).
In 3.02 the white dots would appear for a couple of miles, then disappear!
The breadcrumbs (other manufacturers use the term too) is reference to the Hansel & Gretel fairytail, where Hansel lays a trail of breadcrumbs into the woods, to follow home, so they don't get lost. Of course the birds (or we might say MFT V. 3.02) eat the breadcrumbs, so they get lost anyway!