Build an Interactive Website - Code Challenge: Checking Values

I have completed step 1 and 2 and been given the green light for each. Now When i input my code for step 3, it tells me that my code for step 1 is no longer valid. If a remove my code from step 3, step 1 becomes valid again. I can't see how the containsBlanks() function is affecting the isValidEmail() function?

function isValidEmail(email){ return email.indexOf('@') != -1; }

function requiredValues(){ var requiredInputs = new Array(); $('.required').each(function(){ requiredInputs.push($(this).val()); }) return requiredInputs;
}

function containsBlanks(){ var blanks = new Array(); $('.required').each(function(){ blanks.push($(this).val() == "");
} return blanks.sort().pop();
}