Can you say anything about the "push" to 3.6 users? It was suppose to happen last week. I just checked on http://gs.statcounter.com and usage dropped .4% in the last week, but I'm not sure how accurate it is:

http://gs.statcounter.com/#browser_version-ww-daily-20111129...

I imagine that there are many 3.6 users who simply aren't into tech news like those of us here, and they simply don't know they should upgrade.