Hi, I also have this display problem, especially when I am trying to display multiple maps on a single page.
I have tried to display multiple maps with a Tab module, the primary map displays correct, but the secondary and teriary maps are not displaying correct, i.e. Only part of the map displays in the top left of the map window.
our test site is: http://staging.abtjta.com.au/location-test/
I also can not get the width to go to 100% of the screen.