dang. I never had that happen with a DW. I have broken the casting that the beater sits in on two speed kings though.
I've seen quite a few pictures like this, enough that they can't ALL be dismissed as user error. They were all 5000s, and I don't know if they changed footboard design or manufacturing techniques.
I broke a footboard on a stock pearl pedal because the wingnut for the bass drum clamp was wearing through the bottom. I bolted it back together with a steel plate, eventually traded them for the OLD quadbeater powershifters