I just setup a new heal field, but even though I have added groups and individuals, they cannot get healed by my pstones. However, if I make them OPs, then it works. Its as if they are not allowed, or the allow only affects place/destroy?

Anyway, any help would be appreciated.

feeding, air, heal, and repair work on all people, allowed or not. (changing this for version 7.2 tho). Your issue is a permissions issue.