I was checking all of my random plugins/scripts to make sure they all work with jQuery 1.3 and I found one that is having problems.
An example of it is available at: http://digitalinferno.net/temp/ If you enter some text into the input firebug will report that "filter is not a function" in http://digitalinferno.net/temp/js/jquery.js on line 1961 Anyone know if this is a bug or if I have to change something in my code for the new 1.3 release?