Hello,
I'm running Fences v6.00 'Business Edition' on a Windows 11 Pro laptop. I have 4 fences on my desktop, one of which is a tabbed fence, and I have the 'Keeps groups lined up when moving' and 'Keep groups spaced [8] pixels apart when moving' options selected.
The screenshot demonstrates the issue:

The top edge of the tabbed group aligns correctly with the bottom edge of the 'This Surface' fence, but the top edge of the 'SQL Server' fence docks a few pixels below where it should align; the yellow line on the screenshot shows where the top edge of the 'SQL Server' fence should align to.
Is this expected behaviour?
Kind regards,
/Neil