I have ran into a very strange issue with Google Maps in Chrome 5.0.375.99: if you dynamically create more than one Maps instance, the second and on have a strange bug where it does not display properly, is only shows in a fraction of the map space.
Some Example Pages:
one default - When you click addOne, the new object has the problem.
none default - When you click addOne the second time, the new object has the problem.
two default - Both of the initial maps display properly, but when you click addOne, the new object has the problem.
The really wierd part, is that re-sizing the window will force any improperly displaying maps to display properly to fix themselves. This leads me to believe that what is fixing it is the redraw event