Hi guys,
I very frequently stumble across this UI bug where the Arnold renderview docks into the attribute editor. I think it has to do with me docking the renderview in the UI. Then when I launch Maya next, I sometimes get it. It's not a big deal, a Maya restart solves it. Just wanted to put it on the radar if it wasn't already there.

The error message upon opening the renderview is:
Error: line 1: Object's name 'ArnoldRenderView' is not unique.