Script.aculo.us 1.6.4 Released on 6th September.

Thomas Fuchs has sync’d up to the latest Prototype adding features along the way:

* Update Prototype to V1.5.0_rc1 (read more on Justin Palmer’s blog)
* Add experimental alternate syntax for unit tests (Behaviour Driven
  Development-style)
* Merge assertElementsMatch and assertElementMatches from Prototype’s
  [4986] unittest.js [Sam Stephenson]
* Add assertRespondsTo and shouldRespondTo assertions

// object var testObj = { isNice: function() { } } // test assertRespondsTo(’isNice’, testObj);

* Make Sortable.serialize handle DOM IDs like “some_element_1” correctly, fixes #5324
* Add support for onStart, onDrag and onEnd events directly on Draggables (invoked from the Draggables.notify), fixes #4747 [thx scriptkitchen]

new Draggable(’some_id’,{ onStart:function(){ /* … / }, onDrag:function(){ / … / }, onEnd:function(){ / … */ } });

* Add autoSelect option to Autocompleters to auto select an entry if only one is returned, fixes #5183 [thx cassiano dandrea]
* Added delay option to Draggables and Sortables, see test/functional/dragdrop_delay_test.html for usage, implements #3325 [thx lsimon, tomg]
* Add version and timestamp to indvidual library files for easier identification (the files are preprocessed by the Rake fresh_scriptaculous task), fixes #3015 [thx Tobie]
* Add assertIndentical and assertNotIdentical unit test assertions, which test for equality and common type, fixes #5822 [thx glazedginger]
* Add integration test for Ajax autocompleter for results with no linebreaks, #4149
* Added a custom exception to all base effects when used on non-
  existing DOM elements, added a assertRaise method to unit tests
* Add element shortcuts to Builder that can be activated by calling Builder.dump() (see the unit test), fixes #4260 [thx napalm]

Builder.dump(); var element = DIV({id:’ghosttrain’},[ DIV({style:’font-size: 11px; font-weight: bold;’},[ H1(’Ghost Train’), \”testtext\”, 2, 3, 4, UL([ LI({onclick:’alert(’test’)’},’click me’) ]), ]), ]);

* Make Effect.Puff work correctly for floating elements, fixes #3777
  [thx michael hartl]
* Fix selection of correct option in SELECT element generated by
  InPlaceCollectionEditor for indexed option arrays, fixes #4789 [thx
  steve]
* Fix an issue with redrawing ghosted draggables that are inside a
  scrolled container, fixes #3860 [thx gkupps, tsukue]
* Fix autoscrolling inside scrollable containers when window is
  scrolled too, fixes #5200 [thx wseitz]
* Fix autoscrolling when dragging an element unto a scrollable
  container, fixes #5017 [thx tomg]
* Fix a condition where overriding the endeffect on Draggables without
  overriding the starteffect too leads to a Javascript error [thx
  Javier Martinez]
* Fix a possible error with the drag/drop logic (affects the solution
  to #4706)
* Fix various issues with IE detection and Opera, and setOpacity, fixes
  #3886, #5973
* Remove revert cache code obsoleted by #4706, fixes #3436 (again) [thx]
  tomg]