- Draw a rectangle, say 100 x 100 (I use mm unit, but does it matter?)
1
- Turn on print preview
- Turn off print preview
- OK
2
- Turn on print preview
- Set scale 1/10
- Lines are thicker now, this is good
- Turn off print previw
- Lines stay thick in model view, should that be so?
3
- Set layer 0 to use dash as line-style
- Turn on print preview
- Looks OK
- Set scale 1/10
- Dashes hardly visible, looks almost like a continuous line

In the end of 2,3 a way to reset line width display in model view is to cancel scaling in print preview, ie. turn on print preview, set scale 1:1. I suppose this is a regression since TP1: model view always is unscaled.

The line-width scaling is quite accurate now: Draw two lines 10 mm apart. Set line-width 0.5mm. Set scale 1:20 and the lines exactly touch.