I've been messing around with frame positioning in one of my addons so I had framestack on when I noticed something. Not sure if intended or not but I wanted to report it anyway

I think this image captures what I saw better than words:

Side-effect of a little hack to allow frames to be positioned on pixels without being delayed by a frame. You can tap ALT when in fstack to cycle through frames under your mouse.

Yup, wasn't concerned about the size of that frame, just thought I would bring it up.