After Rollup 13 I receive 'True' is undefined

After I deployed CRM 2011 Rollup 13 I started receiving this error message True is undefined.   It is also complaining about setAgeInHeader.  After I Roll back to Rollup 12 it works.  again.  Any clue why?  This is on the OnLoad Event

function calculateBMI(){
    var height = Xrm.Page.data.entity.attributes.get('emc_height').getValue();
    var weight = Xrm.Page.data.entity.attributes.get('emc_weight').getValue();
    if (height === undefined || height ==null)
    {
        return;
    }
    if (weight === undefined || weight ==null)
    {
        return;
    }
    if(height == 0)
    {
        return;
    }
    if(weight == 0)
    {
        return;
    }
    var bmi = weight * 703 / (height * height);
    //alert('bmi' + bmi);
    var Bmi = Xrm.Page.data.entity.attributes.get("emc_bmi");
    //alert('Bmi' + Bmi);
    Bmi.setValue(bmi);
}

function setAgeInHeader() {
    var birthday = Xrm.Page.data.entity.attributes.get('birthdate').getValue();
   
    if (!birthday)
        return;
       
    var age = getAge(birthday);
    var ageString = '';
   
    if (age.years < 1 && age.months > 0)
        ageString = age.months + ' months';
       
    else if (age.years < 1 && age.months < 1 && age.days > 0)
        ageString = age.days + ' days';
   
    else
        ageString = age.years;
       
    document.getElementById("header_emc_age_d").childNodes[0].innerHTML = ageString;
}

function getAge(fromdate){
    var today = new Date(),
        fromdate = new Date(fromdate),
        y = [today.getFullYear(), fromdate.getFullYear()],
        ydiff = y[0] - y[1],
        m = [today.getMonth(), fromdate.getMonth()],
        mdiff = m[0] - m[1],
        d = [today.getDate(), fromdate.getDate()],
        ddiff = d[0] - d[1];

    if(mdiff < 0 || (mdiff === 0 && ddiff < 0))
        --ydiff;
   
    if(mdiff < 0)
        mdiff += 11;
       
    if(ddiff < 0) {
        fromdate.setMonth(m[1]+1, 0);
        ddiff = fromdate.getDate() - d[1] + d[0];
        --mdiff;
    }
   
    return {
        years: ydiff,
        months: mdiff,
        days: ddiff
    };
}

Thanks, Paul Nath