However, an improvement to the SSL protocol called SNI (server name identification) solves this problem, by allowing the web browser to send a hostname before SSL certification selection is done. All modern browsers support this extension, but IE 6 and below and all IE versions on Windows XP do not.
Selecting Yes for this option will remove the warning when two SSL sites are on the same IP address, based on the assumption that all web browsers connection to your sites support SNI. If a browser without SNI support connects, the user will see a warning about a mismatched certificate.