Hello.
Thanks to feedback from Church_of_emacs and DerHexer, we fixed a bug in the slides of the flagged revisions presentation at Wikimania 2010.
http://www.slideshare.net/glimmerphoenix/flagged-revs
The bug is concretely in the graph of protection actions. Green and blue lines (slide 23) were mistakenly labeled as protection and unprotection in talk pages, while it actually corresponds to user pages.
I also included Tobia's comments on the sudden raise in the green line:
"The reason for the sudden increase of page protections is mass-blocking of open proxies, which was combined with creating the userpage of blocked IPs with a template and protecting them".
Open sourcing research also works ;).
Best, Felipe.
PS. I downloaded the file, and it has been updated on Slideshare, but the preview still displays the old version. I hope it may be just a matter of time that preview is also updated.