The RSVP system is working FANTASTIC, minus on minor glitch. We are using it on our intranet for employees to RSVP for company events, and a few people have been getting the message 'Error: Invalid Input.' They are only required to put their first and last name, but certain names seem to not work. There doesn't seem to be any rhyme or reason as to why most names work but others do not. However, we definitely need to work out the bug.