I've recently upgraded the firmware in my Vista HCx from 2.40/2.30 to 2.60/2.60 with WebUpdater. After this I'm sometimes seeing much degraded accuracy.
The peculiarity of this is that I can get 20m (60ft) of inaccuracy shown even with excellent satellite reception. The actual error (compared to the position on the map) is usually much greater, like 50m (150ft). When this happens, and I switch the unit off and immediately switch it on, then it shows the exact position on the map, and the location accuracy shown is 4m (12ft). So the reception is indeed good, only the GPS becomes confused, and doesn't calculate the position correctly.
I've asked Garmin support, and they replied that I should perform a reset (PAGE-ENTER-POWERON), but it didn't make a difference. I've also tried to downgrade the firmware to 2.40, but this only changed the "Software Version", the "GPS SW Version" remained 2.60, and I'm still seeing the same problem.
Anyone having a similar experience?
