I love the Griddlr theme by Jonathan Haggard for my mixels in tranining tumblr blog. It looks super on the computer and iOS. Sadly, it is not perfect on the iPad. Even on wifi, the way it gets incrementally renders all the images feels a little strange compared to the desktop version. So the for quest for the perfect Mixel tumblr theme continues with Stacky ver 2 by AndrewStichbury. It seems to rock pretty loud on iOS and desktop web browsers.