Meeting was mostly private discussing some security issues in Foswiki 2.1.5, and the NatEditPlugin.
It was discovered that the NatEditPlugin was unable to handle some ACLs. When the ACLs were not supported they were silently ignored and lost after save.
This also applied when a topic was edited from a Topic Template, or when a topic was copied, which used the source topic as a Template.
It was decided to disable the Permissions tab when unsupported settings were detected.