For some reason, when I use "Save As" to create alternate versions of an image (.jpeg vs. .TIFF), it sometimes doesn't save, at all. Other times, the file appears as a white document icon in the folder with no file extension. The original name of the image is also usually reduced. For example, I had a jpeg named "capt. johnson.jpeg," and when I tried to save a TIFF version, it was changed to "capt" but didn't have a file extension.