Rendering problems with Stitcher 5/ OS 10.6

[Anonymous]

I'm trying to create a simple, two-frame panorama and keep running into a problem. Everything works well until I go to render the image. Ideally, I'd like to create a .psd file, but when I attempt to do so, the progress screen comes up for maybe a second, then disappears as if it's finished. No new file is ever created. I tried rendering a preview image and that worked fine. Then I tried to render the final image as a .tif and got a strange result, the likes of which I've never seen and can't quite describe, so I'll attach a version below.

Can any one offer any insight into this problem?

Thanks in advance.