Going to release the next version very soon, 0.4.3. The change log is as follows:

• CSS 3D transforms
• .attach() takes multiple objects
• Fixed bug with getClientBoundingRect in FireFox
• DOM elements get components added as classes
• Fixed Canvas redraw bugs
• Animate renamed to SpriteAnimation
• Added basic mobile support
• Fixed mousedown triggering twice
• Draggable bugs fixed

There are a few API changes (the last I promise) but the docs will reflect this.