Unwanted Bezier Curve Endpoint Movement
 

I've noticed some disconcerting behavior with bezier curves and am wondering if the design was intentional or a bug.

When I create a straight curve between two text boxes, the endpoints automatically attach to to the nearest exterior point of the boxes (when magnetic attachement is enabled of course). If I select the curve and change its type to Bezier, however, the endpoints immediately shift to the center of both boxes and I'm unable to coerce them to the exterior. Only Bezier curves do this. All other options behave as expected. Any ideas?

I'm on the latest OmniGraffle.

This has been fixed in the latest OmniGraffle 5.2.3 beta release, it's a bug.