What do you mean by slice spacing? How much the slice view offset changes when you switch slices with the arrow keys after clicking in the slice view? Or the slice offset change when you switch slices with the arrow keys after clicking on the slice browser slider?

Can you give specific examples (expected vs actual values)? Can you upload a sample scene file?

Sorry, this was an issue that I spoke with you about back in February, but you fixed it the next day.
It is no longer relevant to the current version of Slicer.

Thanks for the clarification, I close this issue then.