This is on the 'develop' branch.

This was a validation problem with puppetclasses in the host group not belonging to the node's environment. The validation didn't trip an error dialog, but does raise inside rails.

#<OrderedHash {:puppetclasses=>["base does not belong to the master environment", "media does not belong to the master environment", "primary-services does not belong to the master environment", "services does not belong to the master environment"]}>

Should probably amend this to just ensure we bubble this up.