[mtg:Grafdigger's Cage] fails to find any cards (Try it: Grafdigger's Cage). I've double-checked it a few times. I think it's something about the
' in the card name.
(This is very minor)
[mtg:Sun Titan] takes you a search page with Sun Titan and Sundering Titan. (Try it: Sun Titan)
I'm not sure whether these are bugs on our part or limitations in the Gatherer interface we're using.
See this question for how this came up.