Google Map theme conflict with Living Os XI theme

Hi all
I have successfully created a google map for my directory listing.
However, when I click on my Listing page, the map is showing as a grey box, with the blue marker over the middle. The picture gallery shows correctly, but not the map.
Please see http://www.barbadospulse.com/listings/blakeys-bar-and-restaurant/ as an example.
I guess this is a theme conflict, as when previewing with Twenty Eleven theme it shows correctly.
I will ask the theme designer as well, but do you know why this may have happened?
Thanks
Robert
P.S. The archive page used to show the full post (before I changed it to only show an excerpt) and the map would display correctly on the 'listings-category' archive page.