I noticed this on my system, with 2005 SP0.1 installed... *) Start a new assy *) Drag a part from the Design Library into the assy *) RMB a face and do a "Select Other" If the part is native 2005, I can select the other face. If the part is pre-2005, the original (now invisible) face gets selected every time. Not good! Does anyone else see this? If so I'll submit... Mike Wilson