Steps to reproduce:
1. Create a new project with an object with a sprite.
2. Save and close the project.
3. Open it again.
4. Read the errors.
Observed result: When I open a project, some images produce a "corruption" error. I go into my Animations folder, and I find the images just plain aren't there. I have to manually add their images to the Animations folder.
Expected result: I save a project with new images. I go into the Animations folder and the new images are there.
Browsers affected: Not applicable, bug with Construct 2.
Operating system & service pack: Windows 7 Enterprise
Construct 2 version: Since at least r120
Edit: This is in a school environment. Could this be the problem?