YUI Library - Selector - Release Notes

2.6.0
  * now supporting cross-browser "for" attribute 
  * gracefully handling non-existant IDs 

2.5.2
  * no change

2.5.1

  * query() returns null when firstOnly and no result 
  * correctly handle quoted attributes 

2.5.0

  * query() now returns single node (not array) when firstOnly is true
  * filter() now works with ID input
  * pseudos and attributes correctly handle spaces

2.4.0

  * Beta release
