title: Call to undefined function jetpack_register_genericons()
body: <p>I am using Jetpack on a clients site for statistics collection and today Jetpack threw this error. I have googled around and found that <a href="https://wordpress.org/plugins/jetpack/changelog/" rel="nofollow">there is a bug fix</a>, which was already included in the version that I am using. Otherwise I haven't found any other useful information as to why I am getting this error. Has anyone also come across this?</p>