[Google Maps API v3] Marker shifts position (relative to image) when switching from overhead to 45 degree view. Fix?

See my question at: http://stackoverflow.com/questions/10056424/marker-shifts-position-relative-to-image-when-switching-from-overhead-to-45-de Google Javascript Maps API 3.5

Re: [Google Maps API v3] Creating Google Maps Clusters by type

I think you can have multiple markerclusters on one map. So each one clusters a different type of marker. The only issue, is that the cluster markers may end up overlapping (or even being exactly on top of each other) - the two clusterers wont be aware of each other to avoid placing markers on to