I found this...:
General Fixes
• Removes NMEA0183 functionality when i-Pilot Link is connected
• Corrects issues caused when user follows the contour while recording an iTrack and AutoPilot is turned on.
• Corrects issue where iTracks were not being deleted from all units on the network
• Corrects issue where sonar continued to ping after sonar was turned off.
New Features
• Adds support for AutoChart PC and Zeroline SD cards
And this...:
http://www.bbcboards.net/humminbird-...umminbird.html
I haven't been able to find any relation to your specific issue...but I'm still looking...
FWIW....I saw that same anomoly in my 1197 for every version after 6.310...except the saw tooth extended from the same place yours is showing... all the way to the bottom edge of the display ....
Rickie