About once a month I get an email asking me about a misprinted card that has half of another card printed on the back. In my best attempts to be helpful and informative, I respond to each one. It's gotten to the point however that I've now got a 'canned' response to these emails. Not once have I heard back from any of the individuals who have contacted me with any sort of thank you, and my guess is that's out of embarrassment for not being able to recognize a new card mechanic.
This leads me to question the quality of Magic's newly designed mechanic, Meld. On one hand, the text on Graf Rats reads, "At the beginning of combat on your turn, if you both own and control Graf Rats, and a creature names Midnight Scavengers, exile them, then meld them into Chittering Host." The key things to point out here are is that it both refers to the dependency on a 2nd card, and that it becomes something new (it says Chittering Host on both sides of the card!!!!). This means that if you read the card, you should (in theory) have a slight understanding of how it works. We can call that a design win.
What's not working is the visual layout. We have something that is visually different from any other magic card (except BFM). It's not new to have double sided cards, so players should be able to cope with that element. That means the confusion is coming from missing information. Our missing information, is literally the other half of Chittering Host. When looking at the physical card Graf Rats, and only that card, you are unable to fully understand what you're getting. This is the design fail, and this is where the disconnect comes into play.
On meld cards, I'm torn. On one hand I can understand why people think they're misprints because of the design failure, but on the other hand, how much leeway can you give people when all they have to do is read the text on the front of the card? Additionally ...google... It takes less effort to google your card, than it does to email me. I'm sure the majority of folks here are redirected through my tumblr blog, which they found via google. I'm going to stop before this gets too ranty. But I'll leave you with this newly spoiled card with a new visual layout/mechanic from Magic's upcoming set, Amonkhet.