I suspect this is a bug.
if I create an object with about 200 objects or more all sharing the same size & center & link them and call this object o200. Then if I put o200 into the content of a second object that rez's the o200 with the rez position identical to the rezing object. Then, if the rezing object tries to link to the new o200 the link fails with the message
" Link failed -- pieces too far apart". The link will work, however, if I reduce the size of the compound object to around 100 objects.