Sharp 52le810un issue

Hey all!
I have searched around and read the thread about the flickering display during public enemies, and I have a similar issue and was wondering if anyone else has noticed it... When watching Blue Ray movies i notice that either in a fast moving scene or maybe it is one that has a lot of color movement like in Megamind that the screen will flicker black 3 times quickly then will flash black and then go back to normal operation.
Now i guess what I want to figure out, and I think I know the answer, I have a Sony Blue Ray player hooked up to the tv, I have hooked up a ps3 and played games and watched blue ray and not had the same issue. I swapped HDMI cables from my cable box so I have tried two separate cables, one brand new, and the issue is still there. I have a friend who has the exact same tv and has not had the issue, but only uses a ps3. I updated the firmware on the blue ray player so it is current but am still having the same issue.
Any one have any ideas? Would a firmware update fix the issue or simply replace the blue ray player
Thanks for any advice

I updated the firmware on the blue ray player and still have the issue, I will try to contact Sharp to see what they say. It only happens on some movies too. We watched Cars and it didn't happen until the last 5 minutes of the movie, and watched "No Strings Attatched" last night and it never happened, both on Blue Ray...
Does brand of HDMI cable make a difference?