[mtg:Grafdigger's Cage] fails to find any cards. 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.
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.