Looks like USCIS knew this beforehand
http://www.uscis.gov/files/pressrelease/VisaBulletin2Jul07.pdf
USCIS Update
USCIS Announces Update on Employment-Based Adjustment of Status Processing
WASHINGTON—The Department of State has revised its July Visa Bulletin to reflect that all available employment-based immigrant visas have been allocated for fiscal year 2007.
As a result, beginning today, U.S. Citizenship and Immigration Services (USCIS) is rejecting applications to adjust status (Form I-485) filed by aliens whose priority dates are not current under the revised July Visa Bulletin.
U.S. immigration law limits the number of employment-based immigrant visas that may be issued each fiscal year.
-USCIS-