word-wrap: break-word
overflow-wrap: break-word

Both of these generate an error in the CSS Validator:
"Property word-wrap doesn't exist : break-word"
"Property overflow-wrap doesn't exist : break-word"

These are both valid CSS3 properties and break-word does, in fact, exist.  Why is the CSS Validator not treating them as valid CSS?  Why does the CSS Validator error out the way that it does?  The CSS Validator claims that it will validate CSS level 3, but it doesn't appear to be working properly.  This submission page only shows CSS2.1 in the component description, is the CSS Validator actually doing CSS3 validation, as it claims, or not?  This error is causing issues with sites that demand W3C validated CSS.