Please, please, please, use the jQuery Migrate plugin and look at the upgrade guide if you’re just starting your upgrade to jQuery 1.9. The plugin will quickly find and fix any compatibility issues, just look in the browser console. Once you fix the warnings you can remove it. Or, leave the plugin in place until you have the chance to fix your code and plugins to make them 1.9-compatible.
For more information about jQuery 1.9.1 please click here