I know this has been reported several times. Everyone knows about it - yet it's not even on the known issues list as far as I could see.
It's a major pain to sit in a 140-prim house, fully furnished - and see ONE prim that needs to be moved by 0.1 meters and not be able to do it. Try to move it - it jumps back the the old position. Always happens.
It's HELL to be foreced to unlink such massive objects - and link them back up afterwards - just to make one small edit!
You *are* aware of this problem. Right?
(In fact - ANY editing of linked prims these days is virtually impossible. The more linked prims there are and the worse the servers are coping, the more impossible it becomes.)