If .attr() is run on no elements undefined should be returned (as should be the case when no attribute is found). Fixes #6012.

Remove the need for the internal setArray method, it was only really used by pushStack anyway. Fixes #6003.

Simplify the special change/submit event removal logic, per Scott's suggestion in 5267824a.

Updated formatting for the change/submit special event logic. Also switched the function declarations to statements. Thanks to Garrett for the recommendation.

Rewrote the live event handling to use the new event logic. Also added in support for live namespaced events. Fixes #5945.

Added some more tests for checking the execution order of events (from last night's changes - routes around Chrome's busted object looping abilities).

A large refactor of the event handling logic. Data and namespace information is maintained in a separate object now, no longer on the event handler. Proxy functions are no longer needed, as a result. Additionally execution order of the handlers is maintained, fixing #4261, and the execution of handlers is maintained even while they're being removed. Live events will be refactored separately.

Fix for problem in IE 8 where deserialized (then reserialized) form markup was getting malformed. Thanks IE. Fixes #5998.

Make sure that injection of object elements continues to work in IE 6. Really hard to unit test this in a meanigful manner (the result is a visually broken plugin). Will need to be diligent about watching for this in the future. Fixes #5094.

Add .delegate() and .undelegate(). An alternative to using .live() which goes from a single root and filters by the specified selectors. Should be used like do: .delegate(td, hover, someFn);. Fixes #6005.