LR beta had a problem with cropping P30 files.
When LR 1.0 came, I thought that was historie.
Thats not the case!
It still crops, but not with much.
C1 4888 x 6510
LR 4865 x 6520
Well it looks like they both crop, only in each direction.
And it get even more mysterious when PhaseOne states
that P30 has 4872 x 6496 active pixles