It seems that Post-Expirator, one of our most useful plugins, has stopped working. When I set an expiration date/time and click update the post is in place for short time then expires - several hours earlier than it was set to.
The only change to our system, that coincides with the change in behavior, is that we recently upgraded to PHP and MySQL 5. Does anyone know if this is what broke Post Expirator? I don't see a way to contact the author on the plug in page.