Google, what have I done to offend you?

Previously, I saw on Huamie that Google's PR started a new round of adjustments, with some sites increasing and others decreasing. Unexpectedly, the number of indexed pages for wonglaye.net dropped from hundreds to zero! The PR also fell from three to zero! While the drop in PR is secondary, not being indexed by Google has caused the website traffic to decrease by almost one-third -_-! I feel like crying loudly: Google, what did I do to you?