I have some IC7 projects containing avatars with accesories/subprops (let's say earrings). These avatars are linked to dummy props moved at different coordinates. When I opened these IC7 projects in IC8, those accesories/subprops appeared "exploded", totally away from the character.

Here's a demo IC7 project: open it first in IC7 to see how it looks, then open it in IC8 to see how it looks. What I've done:
- new IC7 project
- insert character at 0,0,0
- added Plane_A as subprop attached to character's pelvis
- added Plane_B at 0,0,0
- linked character to Plane_B
- moved Plane_B to a different coordinate (it correctly moves the character+Plane_A)
- saved the project
- open saved project in IC8
- Plane_B and the character are in the correct, expected, position, but Plane_A has remained in the same position as when character was at 0,0,0

I reported it in IC8.01 but happened also in IC8.0

Demo project
https://www.dropbox.com/s/di2oddtk7bq6bcu/IC7link_open_in_IC8.zip?dl=0