Disappearing Contact Photos

[JayInNJ]

This has happened twice now. I am synched to Gmail and Facebook. I have set some of my contacts to photos I have locally. After a few days or weeks I find my contact photos to disappear or change. In some cases they have reverted to the Facebook profile photo. In other cases they are blank although they are on Facebook. And some of them are blank although I have no connection to them through Facebook. Does anyone have a clue as to how to stop this? Basically I would like them to use the Facebook photo unless I override with my own.