Someone (can't remember who anymore, even though it was just a couple days ago!) pointed out to me that Google scholar seems to be doing weird things with citations. In particular, it seems to think that the citation relation is symmetric (at least in some cases).
Here's an easy example. Look up Khalid El-Arini's 2009 paper "Turning down the noise in the blogosphere" paper on Google scholar (or just follow that link). Apparently it's been cited by 24 papers. Let's look at who cites them. Apparently in 2003, in addition to inventing LDA, also invented a time machine so that he could cite Khalid's paper!
The weird thing is that this doesn't seem to be a systematic error! It only happens some times.
Oh well, I won't complain -- it just makes my H index look better :)