We are experiencing a problem with one of our web servers.  The issue was caused by a failed security update. Sites affected by this issue may get an error saying that a required PHP component is not installed.  We are working to resolve this issue. 7:15am

Update 7:31am:  Some sites are back online.  We are still experiencing issues with the server, but on most sites those issues should be unnoticeable.

Update 7:55am:  We have gone through all the sites on the server, and they all seem to be functioning properly.  We are still getting some errors on the server, which we will be working to correct, but in the mean time, all sites are online.