Yes. Please contact VMware on this - this is a known issue with v5.1. (still broke in vcd 5.1.2)
Anytime the uplink gets changed to "None" - by setting it, or cross VDC's (or orgs) that do not have the same network; firewall rules all all deleted (data loss). The reason for this is security (but I would argue the current deletion of data make the system less secure).
