We have a strange issue that has just started happening in our Lightroom on our Mac. Only when Lightroom is open, large yellow splotches can be seen over the Lightroom interface and the photo previews. Also, when we open windows such as Preferences, the background is yellow instead of grey. We tried calibrating the monitor to no effect, and our histograms look normal in any case. The oddest thing is that when we export the photos, or try and take a screenshot of what's happening, the splotches do not appear. Any ideas would be greatly appreciated! ... View more