The following code in Template:2010/Donate-nowIT is throwing Javascript errors (probably because the code is trying to execute before the form is built, rather than afterwards, i.e. it's not in a function.
document.paypalcontribution.utm_medium.value = getQuerystring( 'utm_medium' ); document.paypalcontribution.utm_campaign.value = getQuerystring( 'utm_campaign' ); document.paypalcontribution.referrer.value = document.referrer;