I am using custom fields on the post page and am frequently updating fields in each post as I'm testing. I've noticed that when I update a custom field and hit save, the file sometimes doesn't save immediately. If I hit update once or twice on a few custom fields and rehit save, the file will then usually save. Not sure if this is a bug or if maybe a plugin is creating the problem. I eventually get the file to save after two or three tries but really have to watch what I'm doing to ensure the file save takes place. Has anyone else noticed this behavior? I'm using v2.61.