[dnanian]

Hm. Permission errors? Sounds like the file itself might not have had the right permissions, but it's hard to know for sure without a log or more information.

Anyway, I know the "Disk Image..." picker is a bit confusing when you have an existing image. We didn't want to totally rewrite the panel so it dealt with "pick" and "save", and also didn't want two commands in the pop-up. Probably a matter of being a little stingy with the UI, but this case doesn't come up that often...

You can change things as much as you want and the images should still work... maybe I don't quite understand what you mean. They're really handled just like any other volume.