To follow up on my own post here, I researched the forums some more and found one user who reported that this problem occurs on nvidia as well as ATI cards. From Urmas, dated 12/16/06: "Initially I thought, that it might be related to ATI gamma problem (ATI drivers problem) referred earlier in forum. But lightness does not change. Just colors change. My laptop has ATI Mobility Radeon 9600/9700 series video card. Then I made test: Removed all profiles from laptop display color managment and run PTE v.5 slideshow - no change in image display during slideshow. Recalibrated display and problem is there - the created profile is not used by PTE. After careful observation, the problem exists also on my desktop with NVidia video card. Color profile is discarded both, on my laptop (ATI) and on desktop (NVidia) while executing PTE 5 slideshow. Because my desktop monitor without profile is much closer to profiled color, initially I did not notice change. But the change is there in both cases - on laptop and desktop. " Then there's still the nagging question about why my ATI card doesn't show this issue with software other than PTE. So I guess I'm wondering, is this strictly a problem with ATI or is there something in PTE that needs to be tweaked in the next release? I'm not trying to shoot holes in PTE, as I think it is otherwise capable of some excellent output. I'd love to make it my slideshow software of choice. One of the workarounds that was offered by Admin1 to the above was, "1) Use GDI graphical engine or not exclusive 3D mode for slide shows (both options will be available in the next beta 9 of v5.00)" Is this an option in the full v5 release, and if so, how do I do this? Regards and thanks again, Steve