On Malhavoc's site is the official errata and clarifications page for Iron Heroes. Unless Starfall rules contradict this, all errata on that page will be used in Starfall. The page is at www.montecook.com/cgi-bin/page.cgi?mpress_IL_errata
Johnny was a chemist's son, But Johnny is no more. What Johnny thought was H2O Was H2SO4.