1) Two of the patents cited by Microsoft cover legacy compatibility features in Microsoft's FAT filesystem, support for which is implemented in Linux
TomTom intends to make the requisite changes to the FAT code within the next two years. The company's agreement with Microsoft provides a guarantee that it will not sue TomTom users in the interim.
2) The three patents that TomTom believes Microsoft has infringed upon are "Generating a Maneuver at the Intersection Through A Turn Lane" (5,902,350), "Route Generation in a Vehicle Navigation System" (5,938,720), and "Quick Selection of Destinations in an Automobile Navigation System" (6,660,994). Microsoft's Streets and Trips software uses similar methods to generate its navigational directions, and TomTom says that Microsoft knowingly adapted TomTom's patents in order to implement this functionality.
3) Navigation device-maker TomTom has settled its patent dispute with Microsoft, putting an end to the current round of litigation between the two companies. The terms of the settlement, which were announced by Microsoft on Monday, are said to be fully GPL compliant.