There has been a new version of WP released overnight. Some of you who have already been moved to our new server might already have had the update automatically applied to your site. If you log into your WP dashboard and see the version is 4.2.3, you are fine. If not, however, this is a pretty major security release, with lots of bug fixes thrown in, so it would be a good idea to log in and do your updates as soon as you can.
Details about the update are at https://wordpress.org/news/2015/07/wordpress-4-2-3/ if you want more information. So far, no issues have cropped up, but please let us know if something happens to your site!!