Skewed lines and flickering at the top of the picture are common issues with Macrovision. Do you have your player hooked directly to the TV, or looped through a VCR?
It could be simply that your TV is very sensitive to Macrovision in 60Hz mode. Have you tried it with a different TV?
If it`s any consolation, this is very common. Macrovision is crap, but the studios don`t care if they bugger up your picture quality so long as you can`t copy their stuff. The solution is to get a Macrovision remover or "chip" your player to make it Macro free.
Mike