No idea. All I can say is that switching to HDMI 2 and then back to HDMI 1 was the best way of overcoming it momentarilly. I thought it was just my 3010 being faulty.
Mine did it on 2D BD as well, however.
I've heard of other people saying they have the same issue. I'm not sure if they've all had PS3 slims (as you and I both do). I didn't contact Epson about it- I'm not sure if anyone has.