Is the magenta cast on screen or only in the print?
If it's only in print, I would double and triple-check your CMS settings. A magenta cast is a classic symptom of a file being double color-managed -- once by Photoshop, once by the print driver.
Also, I ran the "Show profile info" script on some iView-generated contact sheet jpeg's. Guess what - no profile! Looks like a bug that needs fixing in iVIew.
(However, this would NOT cause your strong magenta problem. Depending on how you handle an untagged file, there might be a shift in density and/or saturation, but definitely not a strong magenta shift.)
The cast is both the print and the screen. It isn't a CSM setting. Basically, all of the original files look great on screen and print if I printed the individual files. But when I make a contact sheet via Iview, the color cast of certain images are changed both on screen and in the printed contact sheet. Its not every image, not an overall effect. Its just particular images on the contact sheet. So I'm not sure what is going on with those files during the conversion. I have noticed that they all do have the same tone (usually) so maybe its just a conversion issue within the Iview process.
I haven't had time to send a query to Iview, but when I do I'll keep it posted here.
Thanks again for the responses!