Here's one problem in the Debug Settings:
Camera Offset Default shows up normally with x,y,z of -3, 0, .2 , I believe.
The -.3 x value puts the default camera position behind you.
When you click the increment decrement triangle for the x value the x value changes to 0, and can't be made any negative value from then on.
This can be changed manually in the settings.xml value to a different negative x value and it works properly, changing the default camera position.
Altering these values using Debug Settings causes no immediate effect.
The changes do appear when you restart the program.
The complementary setting for the focal point, FocusOffsetDefault, makes the change in focal point in real time as you change the values with the inc & dec triangles.
Anyone notice any problems with other of the Client / Debug Settings options?