Allow me to restate the obvious ...
since everyone else is too. This is disturbing on SO MANY levels.
The fact that they can't merge a handful of words into the database shows how poor the design is.
The fact that the database is that big to begin with is ridiculous.
The fact that a dictionary is part of the operating system is a pathetic design.
The fact that changing any part of the operating system other than the kernel requires a reboot.
The fact that MS just puts the blanket "may require a reboot" on every single patch they put out.
I question the validity of adding proper names, even those of famous people. Allow the lusers to add their own on an as needed basis. IE "Britney" is a misspelling and I don't want it in my DB even if some illiterate swamp dweller named her talentless dropping that.
The sensationalism of labeling a dictionary addition (addition!, not even a correction) as Important. Classic Boy Who Cried Wolf, and this is why they get no respect when they call something "critical". I'm with JonB on the "trivial" or "pointless".
[Where's the icon of a baby duckling blindly following the others?]