important permission bug fix to dotlrn_community::new. new communities should _not_ inherit perms from the root dotlrn instace, since all do…
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important permission bug fix to dotlrn_community::new.new communities should _not_ inherit perms from theroot dotlrn instace, since all dotlrn users haveread on the root dotlrn instance. without thisfix, users will be able to read stuff in comm'sthey are not members of.
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