Unified the formatting of core.js. === or !== are used wherever appropriate, syntax has been normalized, braces are added in all cases, and jQuery() now returns an empty set.

Backed out commit [6260], was causing too many problems. We'll have to bite the bullet and assume that the incoming result set has array methods. Un-fixes jQuery bug #4250.

Removed the objectAll check from jQuery.support, was causing problems with broken ActiveX controls. Fixes bug #4017.

Simplified the structure of the .css() and .attr() methods (reducing the number of calls). Need to optimize $.css/$.curCSS/$.attr still. Fixes #4269.

No longer use arguments.callee or RegExp (use new RegExp, instead) for ES 3.1 and Caja compatibility. Fixes jQuery bug #4251.

As it turns out, the context was being started at a higher root than needed - fixing this speeds up > selectors.

Made some changes to how .find() works, inlined the duplicate check - should change other methods to act similarly. Goes towards fixing #4240.

Cut down on some more function calls for jQuery(...). Everything points back to the same root jQuery(document) object now. Going towards ticket #4240.

Reduced the number of function calls required for .find() (single element root), optimized some calls to jQuery() as well. Goes towards fixing #4240.

Landed some improvements for improving the performance of ID-rooted queries (e.g. '#foo p'). Fixes jQuery bug #4236.