Google Analytics Tracking Change on March 20th?

I noticed a sudden trend in my GA starting on March 20th. I thought it was a fluke, until I noticed that 3 days later the change in numbers still persists.

All signs point to Google Analytics blocking an IP range and/or bots from being tracked.

Starting on March 20th, the number of pageviews and unique visits had a sudden drop.  This also coincided with an increase of pages per visit (shown below).

Pages Per Visit
Pages Per Visit

I have compared my pageview data to Clicky and AdSense and their data shows no change.  This leads me to only one conclusion: GA is blocking some type of traffic and has not announced this yet.

Did you discover similar findings?  Let me know.