Head spins while in F5 view in creative mode

If the player is in the creative menu, The players head will begin to rotate erratically while in F5 mode.

This is easiest seen by making the survival inventory texture fully transparent before starting the game.

It appears to rotate the head on the opposite side to where the mouse is.

• Still present in 1.6.1 PR *

To reproduce;
Start a new creative world, Press F5, Go into the creative menu.