Gaelyn I am getting an error every time I attempt to update the thumbnail image (for any of my courses). I tried uploading the same file on a different computer, and I tried uploading a file that had already been accepted as a thumbnail image once in the past (to confirm that the file wasn't the problem).
neoncube Gaelyn Ah, thank you very much for letting me know! It looks like I'd forgotten to migrate some settings when moving to the new web server. This should now be fixed 🙂