Troubleshooting

I've got the same errors, but as all these accounts belong to bots, I don't think it is a big loss if they are not stored among the humans.

(I think Diederik is currently making a video on how to replicate the study, so the second problem should be fixable as well...)

Exactly, these are bot edits and are discarded at the moment. The reason is a limitation of Mongo. With Mongo 1.8 this should be resolved so if you are really interested in these edits then I suggest you wait for Mongo 1.8. Else, there is nothing to worry about.

You are right, Mongo 1.8 solved this problem.

You are right! I am waiting for the tutorial video :)

Thanks for everything, Diederik!