It's finally here, the new jQuery 1.9 🙂
There's quite a few things that change in this new version, check them out in this Upgrade Guide:
Migrating to the 1.9
If you're migrating to the newest version check out this oficial plugin:
This project can be used to detect and restore APIs, features or functionality that have been deprecated in jQuery and removed as of version 1.9.
Get it and use it