Just downloaded KDEnlive today. Worked normally (OK, a few crashes... that seems to be normal) for a while. After a while, whenever I play a clip, the Yellow channel is gone, anything that was yellow appears blue. This happens also when you load a new clip, close the file and open it again, or render, however it plays normally in fast forward or revers. This is a file with no video effects whatsoever, just a clip pulled in from a video camera. the clip plays normally in other video display software.

reinstalled the package and it still does the same thing. Whenever you play a clip the colors are all blue, no yellow.

Does it look the same after rendering?
Does it look this way with all files you tested?
Does a color clip look normal?

Also, does it appear this only when you are playing and not paused, or both?