Old frames are replaced with new ones

If you add a new frame to a sprite's animation and drag it to the front, the frame that use to be 1st will lose its image and obtain the image of the new frame when you save the project.

This bug ruins animations.

framebug.capx

Steps to see the bug:

1. Open sprite, add a new frame.

2. Drag new frame to the front of the animation.

3. Draw something on the new frame, or load an image.

4. Save the project as new file.

5. Preview the project, look how the old frame is gone!

Cleaned up and refined the topic, hopefully it's clear and concise. I'd love it if someone else could confirm this bug since it's been happening to me for 8 months across multiple projects.

Thanks for the good repro, found the issue and should be fixed for r100. Sorry it took so long to solve this one - we really need a good reliable repro like this to be able to do anything about it.