Hi there, I am a long-time reader of this forum, but I decided to make an account to discuss the following: I recently clean installed Yosemite 10.10.5 on a new HDD (spinning) in my late 2011 Macbook Pro. For years I had Snow Leopard installed and it was great, but due to compatibility issues and slow browsing I made the step to Yosemite. I must say it's all working great, but I notice strange color differences when navigating through my dock "stack" folders (applications, documents and downloads) when they pop open after being clicked/tapped on. When the cursor is moving to a file with a long name it creates a white label. Depending on the background this label leaves an even bigger white "area" or border behind resulting in white blocks on a grey-ish transparent background. When the transparency is reduced in system preferences it's a non-issue, but then the dock is too bright for my liking. So I would very much like to know if other people are experiencing the same and whether it's something that can be fixed. Ooh before I forget: I experienced this issue on multiple installments of 10.10.5 (on the same device). So it seems re-installing doesn't do the trick. Thanks in advance! PS: added a picture for evidence. Update: someone told me to do a PRAM-reset, so I did. For a moment I thought there was improvement, but unfortunately not. Update 2: When I move the dock to the left-side of de screen the problem doesn't seem to occur. So the problem is mostly visible on the right-side of the screen, on both macbook pro and external monitor. Perhaps hardware related? Or a strange bug in Yosemite? I hope there's a fix for this, because it looks kind of awful once you know it's there. I hope my machine is alright.