Thank you all for your thoughts and suggestions. I think I've narrowed the problem down to some conflict C4 Pro has apparently developed with my OpenGL renderer. I'm working on a dual 1 GB G4 with a GeForce4 Ti 4600 AGP card. As long as I keep to the native Eovia interactive renderer and don't select OpenGL in the preferences, everything seems to import fine and behave while I'm working with it. Odd thing is, this problem only just surfaced in the last week or so. Am I remembering correctly that C3 had a problem with the OpenGL renderer for a while when it first came out? Tunesy: Yes, I'm just working with C4 Pro at the moment. MarkBremmer: I have made the folks at Eovia aware of these problems.