I recently updated to WordPress 3.1, and with that update, something very interesting happened. Links became unclickable -- clicking on any link would literally result in nothing happening. Interestingly enough, all of the jQuery stuff still works. Removing the jQuery Mobile script gets rid of the problem. The error being generated was:
Error: uncaught exception: [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIXMLHttpRequest.open]" nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)" location: "JS frame :: http://......./wp-includes/js/jquery/jquery.js?ver=1.4.4 :: anonymous :: line 138" data: no]
Any idea how to fix this?