Dropdown on user input isn't firing

Dropdown on user input isn't firing

When I write script for the on user input event of a dropdown, even script as simple as an alert box, instead of executing the script I get the little circle icon forever. My app was working very well only six hours ago, so this is a very new bug. Please let me know what you find.

Thanks,
Brennan

Example: http://creator.zoho.com/snhca/snhca/form/148