A new version of great php-spam protection bad-behavior is released. It seems that Google is now using some IP's from china for crawling.
So it's recommend to update your software.
I had some problems during using google's rich snippet tool with bad-behavior.
Google's tool sends "Googlebot-richsnippet" as user agent sting in http-header and it will be blocked by bad-behavior.
So you can fix it quick & dirty ba adding this header to whitelist file as workaround.