Metric or US system for GPS track data

This month -- the option to switch from the metrics system (meters, kilometers, ...) to the US customary system (miles, feets) for every track. Just go on any track, select "Units" (top right) and select the system you want.

Alternatively, edit your profile and (un)check the "Use US/UK metrics (miles, feets, ...) when displaying track data" checkbox.