The bind variables should be an array, not an array reference.... Apologies for wasting your time, dear monks. I'd delete this node if I could.

Not a waste of time at all, and it's more valuable to leave the post up than to delete (or even strike through). Any mistake you make will be be made by countless others who might be spared some time because your post remains up and appears in search results. And in reading through the new nodes it's nice to be reminded of things to watch out for in the future.