jQuery 1.3 正式版即将在 本月 14 日发布，这是 1.3 的第二个测试版，jQuery开发团队希望在正式版发布之前做足测试工作。

下载地址

http://code.jquery.com/jquery-1.3b2.js
该版本的改进包括：

So far two changes in 1.3 have been the most likely to cause problems:

Old, XPath, style attribute selectors: [@attr=value]. These have been deprecated for quite some time - and we’re finally removing them. To fix it just remove the @!
Bubbling triggered events. Triggered events now bubble up the DOM - some plugins haven’t expected this and have had to adapt. Its pretty easy to fix your code to “protect” against bubbling - add the following statement to your bound handler: if ( this === event.target ) { … }
新闻来自:http://blog.jquery.com/2009/01/05/help-test-jquery-13-beta-2/