Hi Everyone,
The handling of TIFF files in Photoshop CS5 has changed slightly from previous versions. Some of you may notice when you import a TIFF rendered with alpha that your background image is not shown. I have included a PDF that shows how to quickly bring back your background image once you are in Photoshop. Hope this helps!
Brian
http://keyshot.com/forum/index.php?topic=1204.msg4438#msg4438
If you don't want to download...