This issue is affecting us also. I've been experimenting with the events listed at http://code.google.com/apis/maps/documentation/javascript/reference.html#MapOptions but haven't yet found any kind of fix. If there was any way of making gmaps only accept a single finger pan I reckon the issue would go away.
BTW: A user has also posted this problem on stackoverflow at http://stackoverflow.com/questions/5170572/iphone-google-maps-v3-pans-after-pinch-zoom -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-maps-js-api-v3/-/h6b-M4UdgP4J. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
