After upgrading to 10.5.6, the vast majority of my recently created, saved, or altered image files (JPEGs and PNGs, mostly) no longer feature a thumbnail preview image while in icon preview view mode. Rather, they merely display generic icons indicating what kind of file they are. This is unbelievably frustrating. Is anyone else experiencing this? Help! EDIT: It effects old (read: not recently created, saved, or altered) image files as well. There seems to be no rhyme or reason as to which image files are affected; one folder will display thumbnails, the next will be full of generic icons. PS, this is not an iPhoto issue. All my iPhoto images have thumbnails, as per usual. This issue concerns image files in folders and on the desktop.