When in doubt... use JSLint to get it out!
I just ran into a similar problem whilst copying this from JFiddle;
$('input[name=MeetAll]').change(function (e) {
$('#MeetMost').attr('checked', !$('#MeetAll').attr('checked'));
});
$('input[name=MeetMost]').change(function (e) {
$('#MeetAll').attr('checked', !$('#MeetMost').attr('checked'));
});?
Jslint told me i had a random "." Charachter...
Things that make you go "hmmmmmm"