I am unable to display picture in the Media Center. Yes, they are .jpgi I have seen where in XP they have revised the registry. Does this need to be done in Windows 7? I am using Infraview and understand this might have created the problem.
The thumbnails in the media center is probably messed up. The first link below provided the causes for the corrupted thumbnails and the second link has a reg file that you can download & merge into your Windows registry right from the desktop.