I haven't had any problems moving my stuff over the course of several computers (iBook 500 > iBook 600 > iBook 800 > PowerBook G4 667 > PowerBook G4 1.25 > ProBook 2.0) with no hiccups whatsoever.
If your hardware is ok, then one of the culprits might be Rosetta.
PS It would help if you would spend some more time to create a more readable post.