It's been barely a week since the last one, but Sony's now begun rolling out firmware version 1.67. It's another meaty download, weighing in at just under 100MB, although there's no detail on what it changes -- we're still exploring the update. Following the refresh, you can also pick up the PS Vita's latest free game, Montezuma Blitz, a Bejewelled-style puzzle game. However, it's not the first game to be offered up free on the Vita and some pesky in-game purchases taint that freebie status a little. Both the update and game are available to download on your Vita now.