A Rollup Update has been released for Outlook 2007 and can be downloaded and installed manually, but is also being offered via Microsoft Update.
Update KB2687404 for Outlook 2007
This is a non-security update and has been described as “contains the latest stability and performance improvements”.
This rollup updates contains 16 fixes which were released in 2 hotfixes since July 2012.
If you have Microsoft Update configured to also update other Microsoft applications, then this update will also also be offered via Microsoft Update or has already been updated automatically for you.