I have just noticed that my epson v700 produces a narrow streak in the scan direction.
Have you ever seen something like this? By what is this caused? Dust on the ccd?
It appears over the whole picture. I used vuescan and epson scan with the same result.



Click image for larger version.  Name: streak.jpg  Views: 30  Size: 53.1 KB  ID: 108034

100% crop @1600 dpi (sky)