The new sunset date of DFA API version v1.18 has been set for February 28th, 2013. This version of the API has been deprecated since November, 2012 and was originally scheduled to be retired in December, 2012. We pushed back this sunset during the holiday season, but the time has come for this version to be laid to rest.
If you’re still using v1.18, please be sure to update your applications before February 28th. Our release notes will help you identify differences in v1.19, the most important being the necessity to use HTTPS connections. We are available on our forum to help you with any questions you have.