More info: I just noticed when sketching that if I draw something, like a rectangle, and enter dimensions while drawing it (by tabbing), the size is correct and the rectangle is fully contained (all black). But the dimensions disappear from view. If I then try to apply a new dimension, a small dialog box with the existing dimension (and a check box and button) pops up, but the dimension cannot be changed. This makes it impossible to change the size of any geometry in the sketch.
Has anyone else seen this behaviour?
Anyone know what I did to change this behaviour (it worked differently before - dimensions remained visible and could be edited easily).