If you export or link to a mymaps map/kml then icons might be missing and not showing on the map with the plugin.

The problem is caused because Google Maps Javascript API does not support icons with a colour (<color/>) definition inside de KMl file and if this is different then White.
This problem is reported at the issue tracker of Google Maps Javascript API.
I starred this issue, if you can do the same, it might get attention soon from Google.

You can solve the problem with the following options in mymaps:
  • Use a white icon
  • Select an icon from the option more icons
  • use a custom icon (this will use an icon outside of mymaps)
  • use kml renderer geoxml and version 3.4 of the plugin (email me for this version)
I hope the issue will be solved soon.