No fix yet. I posted something on the Vais forum but it doesn't sound like other Vais users are having the same problem. As far as the antenna mention - I do have my EZ Pass in the window right near the rear view mirror. I guess that could cause some interference but I would think other EZ Pass users would have that problem as well. Radioactiveaudio - do you have a Vais iPod unit?
Mine seems to loose positioning when I am actually using it to get directions. But it's difficult to tell if thats true since it's only happened 3 times. I only have 1200 miles on the vehicle and have used it for directions about 5 times.
Well, I spoke too soon. I just got a reply from the administrator on the Vais forum. Here is what it said:
"We have had this problem back in January of 2006, in about 500 units.
Our factory installed a wrong component on the board that was causing this problem. If you bought your unit around that time, then you need to send it back for repair."
Looks like it was not a Lexus problem. I'm just happy there is a fix.