Garmin,
Who is monitoring this post? I've had this issue since early March. I was sent a reworked GPSMAP 640 back in March. No one was aware at that time there was an issue.
I did talk to Product Support Specialist, Lance Cavanaugh on June 29th 2011. Mr. Cavanaugh, Asscociate 5915 did indicate that this was a known issue and a fix did not exist at this time. Reset did not fix this issue.
I was told to shutdown the unit every 20 minutes. This is a safety issue and has not worked very well. Many "U" turns thinking the display is providing me current routing information.
Please provide an earlier Map and Firmware release till this gets resolved please. There is nothing posted that talks about a known issue. Can someone please keep GPSMAP 640 Users informed as to what timeline is being used to resolve this?