Wrong gmap location display

I have just upgraded to 7.x-3.x-dev and my "map" view not working well. For each node, I have a single location, and map display only one marker and position. The code for call the block is:

$block_1 = module_invoke('views', 'block_view', 'map-map-block');
print $block_1['content']; 

After upgrade, I see the string "Array" instead of map. I try to add "print render $block_1['content'];" and finally I display the map, but with multiple markers, one of each node I create (see attach).
There is a string to theme correctly my map or any kind of patch? It isn't correct the string "print render"?
Thank you.