3D cursor mis-alignment

Some thing I have just noticed is a horizontal displacement with default “Cursor-> Grid” position of the 3D cursor.
In the top view the cursor sits about 1 pixel to the left of the green line.
In the front and side views it’s 1 pixel to the left of the blue line.
Does anyone else have this?
I am running 2.36 under Linux with a Nvidia card.

Yeah, but it makes no difference