Casualty of a Google Panda Update?

I’m beginning to wonder if my blog has become a casualty of a Google Panda update. Looking at Analytics my traffic is down 40% over the last month yet I’ve only posted a handful of times. That’s a pretty dramatic drop when nothing else on the site has materially changed. As I search on Google for post that I’ve written which have driven traffic to this blog they’re nowhere to be found.
Screen shot 2011-11-12 at 11.05.00 AM
Then again, perhaps I’m just getting punished for my Leaving Andriod post. (but seriously, that post was on Oct 20th)
Update Jan 16, 2012: Down traffic continues to the point where my traffic is 1/3 of what it was a year ago.