According to the Microsoft Knowledge base article for the update it is to correct the built in dictionary's spelling of these words Friendster, Klum, Nazr, Obama and Racicot. So why the 56.3 MB update? Surely these spellings could be corrected with only a few KB of data? Did Microsoft leave out a mechanism to update their dictionary and this update is stealthily installing one, or has Microsoft included another update in it that they don't want us to know about. Anyway, we don't use Microsoft  Mail, Word, Outlook, Excel etc. partly due to reasons such as these but mainly because OpenOffice and Thunderbird are far better and free, try them for yourself if you don't belive us!