This AutoCAD 2010 Update 2 delivers several fixes for CER and customer reported issues and has been released for AutoCAD and LT customers as a free download. Update 2 is cumulative and includes the Update 1 previously released. Before installing make sure to read the ReadMe document thoroughly especially if you have AutoCAD and AutoCAD LT 2011 products installed on your system.
Announcement from AutoCAD Product Support Tom Stoeckel on the Without a Net blog.