Manfrotto PL200/RC2, Compatible?

I just purchased a new Manfrotto tripod and MHXPRO-BHQ2 XPRO ball head which has a PL200 quick release attachment . The Manfrotto catalog indicates that the PL200 and older RC2 (which is what I have for my existing cameras and lenses) are compatible, but I seem to have a fitment problem. There is a very slight sideways wobble when the old plates are used on the new ball head. The new plate that was included with the ball head is fine.

 

None of the older plates wobble in an old model 200 video head that I also have, so I don't think they are bent or worn. The two plates appear to be the same dimensionally, at least without breaking out the calipers and measuring them. The only obvious different is a small circle, cast in the corner of the RC2 plates. That may prevent the pate from sitting on the corner (the release lock sits underneath this circle when the plate is in place).

 

Has anybody else had this problem? What did you do about it?

 

Thanks for any light you can shine on this.

Break out the calipers I think. And measure the newer Manfrotto tripod top fittings as well.