I tried upping the blue on a few clips in a scene. It worked fine, typing the number '10' and hitting enter. Then I copied the settings and pasted- the new clip became completely black. I eventually found this to be the field 'blue highlight' causing a problem. When I type any number, a lot of times it turns the preview image black. When I slide the number, it happens less often. Between 7.0-11.0 seems to be where it usually loses the picture. Any suggestions on how I can prevent this? I'm trying to work around with other filters, but this is the simplest and easiest one for what I want to do. Besides, I hate not knowing why things won't work.