Hello!
Happy New Year!
This is not exactly a glitch more a case of not wanting to upgrade the viewer, but it is funny so I'll include it here. This happens when someone is wearing something made from "mesh" (a new type of building content) and you are not using the new viewer. Correct view on the left. Most people hate the new viewer so this is the way mesh supporters get seen most of the time LOL. We call it "Mesh Mush"