[FIX](event behavior) Extending the event object did not work well on some browsers, so now the drag property is directly an an expando property; if that fails a copy of the original event is made that dispatches method calls correctly to the original event.
[CHG](datum property) Removed the property from the Mark class. It is no longer used by CCC.
[FIX](lint) NetBeans contribution.
[FIX](pv.Line pv.Area smart segmented mode) A bug caused by sharing the same parent group for the visible segment paths and for the invisible/events unit-segment paths.
[FIX](Color brighter darker) Some calls weren't respecting the call interface of not specifying optional arguments. Changed the argument passing detection to test for != null.
[FIX](pv.Dom.Node insertAt) The inserted node's previousSibling property was not being assigned.
[FIX](IE window.getComputedStyle) Missing method error.
[FEAT](pv.Mark. getShape) Added new argument, 'inset', to allow to obtain a slightly deflated shape for accounting for users' non-precise selections.
[REF](pv.listener IE) Integrated MSIE's listener related code into the main protovis' methods.
[FIX][PERF](pv.Mark renderCore) The stack was being populated with elements already in the stack.
[FIX](Marks effective scale) The effective scale factor was not being updated on the context mark, but only its children was.