I know this is probably the oldest question in the book, but here goes anyway. Whenever I scan my slides, I get these horrible vertical lines in the image that kind of, well, detract from the overall appearance of the image. What is causing this and what can I do? I'm using a Microtek Scanmaker 4850 flatbed scanner with the slide and filmstrip attachment (LightLid 35 they call it. I call it junk!) My scans of prints and other "reflective" objects turn out just fine- colors accurate, resolution good. Is there a setting I don't know about or some trick to get rid of it? Or is my scanner just crappy?