Just updated my spacenavigator drivers and noticed something. Not sure if it was there before now, but since I was looking.....

Using the split view and all movement is smooth (While using the mouse in the viewport at the same time as the navigator)

Going to any single view, the interaction with the navigator and mouse in the same viewport is kindof jumbled...

Is this something you are aware of and out of your control? (Perhaps you weren't aware) Can you speak to why it works ok while split view is active and single view gives errant result?

Thanks.