I'm also experiencing an issue where the grid divides are not 1 meter apart, or are not being shown as such. For example, a 1 meter square on the grid is shown as 0.30 units less in the co-ordinate meter. I know the main hull cube is 20 meters along the X axis, and previously the co-ordinate meter would show this when making selections that are snapped to the grid. I have ensured that the grid is set to 1m spacing, and the units of measurement are meters. This makes measuring distances very hard, even though the point selection when creating faces/extrusions shows that the grid is actually 1m square spaced.