Bug [Major] Unity thinks the mouse is ~20 pixels higher than it should be

I've tagged this as major since it's been around since the very beginning, and it still isn't fixed, and makes the whole experience much worse. I've seen many people complaining about it.

Things that are affected:

• right-click rotating in the scene view
• moving (or rotating, scaling) game object in the scene view (you only notice this when dragging the Y axis usually)
  
• DnD highlighting
• dragging animation curves
• dragging Editor tabs (AKA "fumbly tab management" or "can't reorder tabs")

 

It happens because of main menu(Unity DE doesn't have it so they forgot to take it into account): http://forum.unity3d.com/threads/mouse-selection-stuff-offsetted-by-menubar.351161/

 

Whoops, my fault, sorry, should have looked more. Thanks!