I updated my Greasemonkey script that replaces the Bing Map with a Google Map in Garmin Connect. This version is made faster by completely disabling the Bing Map and it no longer fetches the map information twice. Additionally, I’ve fixed the lap display markers and improved the quality of the track line.
I have also posted Garmin Connect Google Maps at userscripts.org.
Note: For some reason I had to uninstall the old script before installing the new one–Greasemonkey didn’t seem to recognize the upgrade.