I recently purchased a new MacBook Pro. I loaded PhotoShop CS 8.0 and PM 4.2.1 (I haven't had a chance yet to go online for an update). My folders of unedited images load fine; a folder of cropped and color-corrected images loads fine (files in both are JPEGs). But of the finished images, saved as uncompressed Mac TIFs, only a few grayscale and one color image will load to the contact sheet. Do I need to change some preference in either PS or PM?