You might be being very unfair to Sinar. I am running Exposure on Leopard (10.5.2) and haven't had any problems except for one small bug which is easily worked around. It's running just fine.
Graham, maybe I am harsh but not unfair. I have worked with all of the other vendor software, Flexcolor, C1, Leaf Capture, Adobe stuff, etc. They all had some issues, but none have been as bad as with eXposure for me.
Please try the following:
1. Make sure both Captureshop and eXposure are installed on your machine.
2. Format CF card in Sinarback, and shoot only to CF card (no use of internal memory)
3. Put the CF card into a CF card reader and copy EXACTLY the contents of the CF card to your desktop.
4. Open eXposure and point to folder on desktop and make sure you can manipulate all images (like zooming, cropping , etc.) ... and process the images to something like tif or jpg.
5. Now take the card out of the reader, and put it back into the Sinarback
6. Reformat card in Sinarback, and again shoot only to CF card as before.
7. Again, put the CF card into your card reader and copy EXACTLY the contents of the CF card to your desktop, WITHOUT adding to the existing directory that you created in step 3 above.
8. Again, process this new directory of images like before.
9. Now, try to go back and re-work the images in the first directory from the first shoot.
Please let me know how you do. Thanks.