If you turn IFC on then it will cause soap opera effect. Also it will cause stutter. I would recommend turning it off.
I know it's uncommon, but I LOVE the soap opera effect! The Panny does it well, but does have a few niggling issues (not just stutter) so I'm looking to make SOE the best it can be.
As for my love of SOE, I am fully converted and totally unapologetic!