I added a DV clip to my project, and the picture displays off-color in the project monitor. It is mostly a dark red color, with figures barely perceptible. I am using Ubuntu 12.04 on an iMac Intel computer. The file was captured from a Samsung SCD23 digital camcorder with Kino.
What version if kdenlive are you using? Does the DV file look correct in a player outside of kdenlive? Is it just one file or do all files from the camera appear the same?