Robert_Charlton - 6:10 am on Apr 27, 2001 (gmt 0)

There's the whole color profiles thing, which is one of the trickiest areas to understand I've ever looked into. I gave it up, but I'm sure there are still pages and pages of postings on the Adobe User Forums.

Another possibility might be that you're inadvertently using the setting that shows you on a PC what pages would look like on a Mac. Mac view is much lighter... in fact, on photos, I find it impossible to find a setting that will look good on both systems.