i'm running into the same problem. i have a map embedded with a javascript/ajax call to switch between maps and charts. on page load the map works fine - but if i click to switch to a chart, then back to the map - it just says maps and does not render the map.
i'm having the problem on mac and pcs, using IE, firefox(for mac and pc) and safari...
the code is in several separate files - i can try and combine them to make some sort of sense, but if you can provide any insight as to where to start it would be greatly appreciated...
v