'Javascript is required error' on node view, but not on same node's edit page

Hi guys,

I'm getting the 'Javascript is required to view this map' error when trying to display a gmap location block for a new content type I have made. Annoyingly, when I go to edit the node the map displays fine.

Also, other content types with the same location block work fine too.

Does anyone have any ideas?

Would any source code be useful? Let me know how I can help. gmap_markers.js is showing up with a 'Uncaught TypeError: Cannot set property 'iconpath' of undefined 3' error.

Thanks, Phil