: A critical fix was implemented for crashes occurring when Microsoft Excel 2007 tried to open books saved in newer versions that used unsupported features.
: Four new citation styles were added to Word: Harvard Anglia, IEEE, APA 6th Edition, and MLA 7th Edition. 2007-sp3
: You do not need to install SP1 or SP2 beforehand; SP3 includes every public and security update released through September 2011. : A critical fix was implemented for crashes