I heard that this could be a graphics bug, and a strange one at that, any other info on this?
Each individual yellowish blotch moves on its own, but they move in a group, a little hard to see, but I didn't have that much time to make the *perfect* screenshot.
First saw them, moving east:
http://i.imgur.com/NdRQ6.jpg
Followed them, some of them moved faster than the others:
http://i.imgur.com/rk0YB.jpg