I am trying to setup environment where most of the tool windows unpinned, and only defs window pinned to the right side of the window. I was able to unpin the window from left side, but I cannot pin it to the right. The window flickers with grey and I don't see any guides. I was able to do that with class tool window. I saw and reported this problem in Beta-1.
Ubuntu 14.04, SE 64bit.