Request: Option of displaying the error message in single location

Thanks for the plugin! I bought you a beer!

It works great, however since I’m hiding certain sidebar items it looks really cluttered with two error messages showing right next to each other. It would be great if we had the option to display the message either below the publish panel, below the thumbnail, or both.

(Also, one more thing that would be cool would be to have the option of displaying a simple custom instruction message in the featured image panel, e.g. “Minimum image dimensions 2000 x 1200 pixels.”, so that people know there’s a requirement beforehand.)

Thanks again!