[Zope] dtml-sendmail tag that worked in 2.1.6 appears broken in 2.1.7

Hello, I have a site that contains the following tag: <dtml-sendmail smtphost="localhost" mailto="zope" mailfrom="EMAIL_REQUEST@SITE.COM" subject="SITE.COM EMAIL"> ... </dtml-sendmail> This worked fine when my server was running Zope 2.1.6. After upgrading to 2.1.7, I get the following error: Error Type: TypeError Error Value: unexpected keyword argument: localHost I've made an attempt to revert to 2.1.6 to resolve this problem. However, I noticed that I was unable to successfully pack the database after moving all the data files from the 2.1.7 tree to the 2.1.6 tree. Has anyone seen/resolved this problem? Any help is greatly appreciated. -Mark