Compass is not shown correctly when showing the map as google map.

Hi,
I had the same issue (Drupal 7.21 - Geolocalisation Field 1.1).
Exploring the css, i found that i had style on my theme which forced a max-width : 100%;
Removing the max-width applied to the images of the widget fixed the issue !
So i'd rather qualify this as a miss configuration from me than an issue from the module. Just remember that the sprite used to display controls (http://maps.gstatic.com/mapfiles/mapcontrols3d7.png) should not be given a max-width value.