I was playing a bit with some of the newer tools and I stumbled on a puzzling behavior with the circle tools:
1 - draw two circles
2 - select either "2 Tangents and Radius" or "Point, 2 Tangents" to draw a third circle
Now I want to remove the outside section of the third circle, so I pick the "Break out Segment" tool and click the corresponding section I wish to delete, but the whole circle disappears as if it were not intersecting the first two circles.
If instead I pick the "Divide" tool, and click the two intersections (under auto-snap) then I achieve the goal. So, the intersections do exist, but do not seem to be recognized as such by the "Break out Segment" tool...
I am including the test file in case (Win7 - 64)