Steps to reproduce this issue:

1. Open the attached project
2. Open 'BugExample' scene
3. It has 4 images under the Canvas which has render mode set to Screen Space - Camera with a perspective camera
4. Play the scene
5. Images start to rotate
6. Notice that various images pop backward and forward as they rotate even though the GameObject hierarchy does not change at all

Captured repro : http://screencast.com/t/tg5DXuknudKe