v1.6.5
When the "Supports" tab is selected and the "Edit Supports" button is selected,
I lose the ability to pan (mouse left-button and drag).
And with v1.6.5, when I click the "Options" tab to pan, the view drifts.
When I drag it where I want it, then select the "Edit Supports" button, the view drifts again.
This is very fustrating. I am considering installing an earlier version.