On July 15th, at about 10:30 AM CDT, our web server smile was upgraded to apply some security updates to various software components. Yesterday, errors started appearing generated by our WordPress sites. After some debugging, no single cause was determined, but offloading some web sites to a separate server caused the problem to disappear.
Today, on the 21st of July, there have been several brief interruptions of service caused by attempts to resolve the problems. All services are currently up and operating properly.
The problems are believed to be caused by the recent upgrades of the apache server. Near future upgrades will hopefully resolve the problems.
We are sorry for the instability.