I have been trying to use Deep Sky Stacker with my new Canon 60Da and found a problem with the the saved images. Frustrating because this is, otherwise, such a convenient program.
Whereas the preview image in the main application window displays correctly, the image saved on disk after stacking is not. Specifically, the image has been scrunched into the first 75% of the width of the frame. Interestingly, the resulting image area is square. It looks like the software is using the pixel height value somewhere it should be using the pixel width value.
The resulting image is unusable. However, by re-saving the image manually from the main window, the result appears correctly proportioned, though scaled in intensity differently.
Update - members of the DSS group on Yahoo have indicated that this is a problem with Windows previewer not handling 32bit TIF images correctly. I recalled having this problem as well in Photoshop CS4, but upgraded Photoshop CS6 displays correctly. The resaved images would have been 16bit TIF.