Well it's 10 whole updates later, so 10x more secure
I've seen many IPB and vBulletin hacked, including that of a friend of mine who used to run a hosting bus. He used IPB, and he got hacked, so he quit hosting business.
As for vBulletin, probably the biggest vBulletin forums I've seen hacked was a starcraft hacking site (ironic isn't it?).
They both used latest, but that didn't help.