I think you should not drink and drive camera's :)

Sounds like a Carrara/videocard problem though. I would think the translation between what happens under the hood to the screen gets scrambled. I have had a lot of visual handicaps regarding Carrara (and Hexagon) after my OpenGL settings were set back to default. That sorted a lot of things out for me.

My own Carrara suprise thing that seems to be unreplicatable. Every duplicate I make keeps using the same replace/scale factor I used at an early moment in the session. No matter what I do, it remains until I restart the program. Waiting for a couple of weeks to resurface.
I have had it since v3 I think. Once the developers tried to duplicate it on a similar system and all. But it did not succeed. I did not give it much thought, but a couple of weeks ago it was suddenly back again.