The line shape can create visual artefacts in the frame editor (see screenshot).

To reproduce:
1. Create a blank application in a blank frame
2. Create a new quick backdrop object and give it the Line property type
3. Change the width to 100
4. Drag the object around the frame editor
5. Note the visual artefacts and the fact that the object is too big for its bounding box

[Build 242 of MMF2 Dev on Windows XP.]