Hi. Why do some images not display a little thumbnail in finder when viewing in a list format, but they do in all other viewing modes? And some images will have a thumbnail, and then when I rename the file to organize my folders, etc, the thumbnail disappears, sometimes from Cover-flow ode also. Which I also don't understand. Similarly with videos, why do some videos not display a thumbnail/screen-cap in any view mode, when other videos, which as the same file type do? Finally this is only a recent problem for me, but more serious than the aforementioned issues. I've had some images/files, that show an in correct thumbnail/cover-flow image. It shows one thing, but when you open it, it's actually a different picture. Mostly it happens when I rename an image, but its also happened just normally. Is there a specific cause that I can fix, or is it just one of those things where you run the maintenance scripts, turn you computer off and let/hope it fixes itself?