Compiz – Window border edge overlaps when using the grid plugin

Problem: Window borders overlap when using the grid plugin in Compiz

This one has been bothering me for awhile. Turns out it isn’t a Compiz bug at all (well maybe it is), it’s an Emerald bug! Are you also using Emerald as your window decorator?

Open emerald-theme-manager. Emerald Settings > uncheck Use Decoration Cropping

Problem solved! For me at least. Here’s a related bug report (https://bugs.launchpad.net/compiz/+bug/1197811) that unfortunately I didn’t find until after I fixed this by using the age old technique of randomly changing settings. But hopefully this post appears in someone’s Google results and I save them from the months of pixel overlapping agony that I had to endure.