Bug of the moment

Just submitted a bug report to Apple (#4244279). It's amusing enough I figured I'd bug you folks with it.

I'm having a problem using NSViewAnimation to resize a window. The final size of the window ends up being a pixel or two or six off of what I actually ask for. Unfortunately, that wreaks holy havoc with the layout of the items inside of the window. NSWindow's setSize:display:animate: has no problems.

Here's a quicktime of the problem.

And the Pröject.

And yes, I did have Pakleds on the brain.

Update: marked as "duplicate"