I'm using the V3 Maps api within Sencha touch and just noticed a problem. When I add clickable markers to my map while the map is not visible(div is hidden in a tab panel control), the click events to not fire. I worked around the problem by making the markers draggable, which then allowed the click events to pass through as well. I set a timer to setdraggable on the new markers to false, a second after the map had finished rendering.
Oddly, generating the markers via the same delayed timing mechanism still would not allow the markers to respond to click events for whatever reason. Seems like a bug in the API.