I totally agree that WordPress is great.  Unfortunately, most people think its great primarily because they get all they need from it for free.  There's money there, to be sure, but not enough to call down a Microsoft level of update and security patching.

I didn't know about Vaultpress, but given the way you're saying its setup, and the amount of trouble it seems to cause to allow for a non-complete solution level, it would seem as if that should be a free version of the service and that the monthly fee should get you a version that gives you a streamlined interface and plugs the holes that we've just witnessed in how it operates.

Like you said, its a shame, but you typically can't keep a good app down for long (for example, revisit your thoughts on Word 2010; I thought they'd broken it with 2003 and rendered it unusable with 2007, but now look who's back and better than ever).  Remember when spam had been such a crippling problem for so many WP users?  Well, here's hoping WP is gearing up for a similar scenario to secure against stuff like this.