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"Kevin Dangoor" wrote <dtml-call "manage_changeProperties({ 'firstname' : REQUEST['firstname'], 'lastname' : REQUEST['lastname'] })">

An aside here - an easy easy error to miss is to use manage_changeProperties when you in fact mean manage_editProperties. The former will set all properties in a sheet, so that if you don't specify something, it gets cleared. Anthony, who's been bitten by this one too often.