[PERDITION-USERS] IPv6 listen syntax

I've just upgraded my mail box to wheezy, and at the same time enabled v6 on it, however I can't figure out what magic syntax is needed for perdition to actual listen on v6. The package in wheezy is 1.19~rc5-1+b1 which seems like it should have v6 support, but it doesn't by default listen on v6, and with what seems like the obvious setting: bind_address 0.0.0.0,:: Fails to start. Nowhere in the docs can I see any examples with v6 addresses, so I don't know if it's perhaps expecting [::] style or something different. Any pointers?