I only skimmed through the posts, but it has always been my understanding that the safety pilot my NOT log any *x-ctry* PIC. Only normal PIC, I guess you could say, and only when the other pilot is under the hood, as others have said.
The only pilot that may log x-ctry PIC is the pilot that is under the hood, due to him supposedly being the sole-manipulator of the controls.
I did not see anyone else mention the x-ctry PIC vs. normal PIC bit in this regard.
Anyone able to clarify?