Check your FeedBurner stats, but don’t worry too much: no, there was no mass exodus, you did not lose more than half your subscribers overnight.

There’s a simple explanation: FeedBurner is missing Google FeedFetcher stats- that’s the number of users who read your blog in Google Reader.  Last time I reported the same, Google Reader represented about 40% of my readership- apparently now it’s about 60%. 

Ironically it happens on the day when FeedBurner is in the news for launching  AdSense for feeds.