Thanks Hank.
What is happening is: after add the new light - although the window title doesn't change - the current focused window becomes the Outliner - if you have a long list there you will noticed the list will be scrolling when you try to make a zoom in/out.
So, by now, just move the mouse over the Outline window (it get real focus) and bring it back to Geometry and you get back the camera control.
What is happening is: after add the new light - although the window title doesn't change - the current focused window becomes the Outliner - if you have a long list there you will noticed the list will be scrolling when you try to make a zoom in/out.
So, by now, just move the mouse over the Outline window (it get real focus) and bring it back to Geometry and you get back the camera control.