When exporting a still image out of FCP, the result is a too dark image. (looks like a gamma shift)
The workaround is to bring the still images in Photoshop and "correct" these files.
but when i bring them in later back to FCP then the "corrected" images are too bright.
But i have to correct them because on any another computer they look way to dark.
(I use the still images sometimes to give my clients a little feedback on how things will look, without giving away too much :)
My material is 1920x1080 25p working on FCP 7 and 10.8