I touched up a photo in photoshop, saved in jpeg, took it to a digital photo kiosk for printing. The kiosk wouldn't read my compact flash card because there was a tiff file present. The problem file had a jpeg extension, yet in the file info it was a document file? I resaved the file as jpeg and got the same results........document file. I noticed my camera saved jpegs in upper case letter, while photoshop saves the file extensiion in lower case. Should this be a concern? How come it won't save as a jpeg file?