[Inf-IT DAVcl] Firefox not displaying events

I have version 0.8.1.1 running against the server that I am developing and it works perfectly with Safari 6.0.4. However with Firefox (v20.1 on Fedora 18 and v21.0 on WinXP) when the client starts up it does not display any existing events in the calendars. It allows me to create new events and will display them until I log out. When I log back in, any events that I created no longer display. They do show up in CalDAVZap/Safari, iCal, and Lightning.

Is there a config option that I need to flip in Firefox to fix this?