Where are VS Error List Options?

This is driving me crazy, I've got VS 2010 Pro, the Error List is showing css validation as a compilation error so filling up with errors I don't want to see (swamping my real errors!) I've looked everywhere under Tools/IOptions, under Html validation options, show errors as warnings(?) is ticked, I just can't see an option to surpress errors which don't prevent compiliation, where is it???
Silas2Asked:
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