[Plugin: Contact Form 7] 3.3.1 breaking site

Hey, longtime user here. Just a note to the dev that 3.3.1 seems to have broken a site today after updating the plugin. I removed the plugin and the site worked. Reinstalled it and the site went down again. Removed it again and the site worked. I have no idea why; it’s working fine on my main site.

http://ww.wp.xz.cn/extend/plugins/contact-form-7/