v0.4.1

React

• setState callbacks are now executed in the scope of your component.
• click events now work on Mobile Safari.
• Prevent a potential error in event handling if Object.prototype is extended.
• Don't set DOM attributes to the string "undefined" on update when previously defined.
• Improved support for <iframe> attributes.
• Added checksums to detect and correct cases where server-side rendering markup mismatches what React expects client-side.

JSXTransformer

• Improved environment detection so it can be run in a non-browser environment.