No idea what is going on here. Here is the query, right from phpMyAdmin:
SELECT * FROM `la_schedule` WHERE \'start_date\' >\'2012-11-18\';
Adding this since this was not mentioned.
SELECT * FROM `la_schedule` WHERE date(start_date) > date('2012-11-18');
Because that's what actually works for me. Adding date() function on both comparison values.