I have a Magellan 2000XL, and have noticed a problem both last weekend, and today. When trying to get a "goto" reading on a waypoint about 1/4 mile away, I noticed the distance reading wandering all over the place, like +/- 300 feet. I just can't get a good, solid, stable reading, even though the unit was locked on to 4-5 satellites. This same GPS used to be good +/- 50 feet, now it's almost useless. This drifting was common several years ago when the government had the "selective availability" turned on, but I understand this has been off for some years now. Did they turn that @^%$#^ stinking function back on? I put new batteries in, but this did not fix the problem. Any ideas?