Unable to generate new atlases for different resolutions

[LeadheadOnline]

So I'm trying to get this thing to be compatible with different resolutions, so I started by trying to create an atlas for .5. Every time I attempt to make one, it crashes just before creating all the 'scene001' files, leaving me with an unusable resolution. Even my first scene, which should only require leadheadcardfinal is unable to run at anything other than 1920x1080. As you can see on the right side of the image, I've got my incomplete .5 resolution folder open, next to my completed 1.0 resolution folder.

Any idea what might be causing this? Thanks!

[bladecoder]

I think it is a problem with the name of the image: black+fade2.png, try to change the name of this image before generate the atlas to something that doesn't contains numbers or the '+' character and let me know if it works.