rethink: created_by field could be undefined, which was causing trouble
rethink: created_by field could be undefined, which was causing trouble

DrXyzzy/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc,tscholl2/smc