On Thursday the 9th, the bug tracker will be unavailable from 11am CET for approximately 5 to 7 hours as we upgrade the bug tracker software. Please check @MojangStatus on twitter for status updates.
The lighting of the item held in the player's hand is based on the player's viewing angle in third-person mode.
Some blocks and items are discolored when viewing from certain angles
Blocks on armor stands render shadows based on camera vector