Corruption after pasting in two files

What steps will reproduce the problem?
1. Open the attached image. (Works with any RBG image I tried, but may as well 
attach one to test. Haven't tried indexed.)
2. Ctrl+A (select all)
3. Ctrl+C (copy)
4. Close the program. (The above was just to ensure something gets in the copy 
buffer.)

5. Reopen the attached image.
6. Ctrl+N (New RBG)
7. Ctrl+V (Paste on this new image tab)
8. Hold shift and drag the bottom right corner into the canvas. (By how much 
doesn't seem to matter, just make it smaller.)
9. Ctrl+C (copy scaled image)
10. Go back to the first image by clicking it's tab.
11. Ctrl+v (paste scaled image)
12. Move the image, and press ctrl+z or just press control+d.

What is the expected output? What do you see instead?
The expected output is for the pasted image to not remain across undos and 
moves.

What version of the product are you using? On what operating system?
Aseprite 1.0.2 on Windows Vista 32 Bit

Original issue reported on code.google.com by kirby...@gmail.com on 8 Aug 2014 at 1:46

Attachments:

1406943379918.png

Leyart / aseprite

Corruption after pasting in two files #444