Tree shadow from transparent leaves mesh [resolved]

All quality levels set to normal, with a closely dense forest area, I'm getting artifacts that look like what might be a maximum number of overlapping shadows.

http://www.youtube.com/watch?v=nyarHqGqxVg

As the character moves, shadows pop in and out, and there sometimes is a circular area where no shadows appear.

Is there a way this can be avoided?

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Did other edits and reloaded, the artifact went away.