I was out for a plod this evening intending to do around 5k or so. My Garmin (301) clocked the third lap, then jumped back to 2.6 miles. I plodded on toward the end of my run, when it hit 2.75, it jumped back again!
On the unit itself, the last 3 minutes record zero miles, and yet Sport Tracks has credited me with 3.34 miles - which is nearer accuracy.
Has this happend to anyone else?
The Garmin is nearly 3 year old and has never given me any problems before.