This may not be a bug but... When uploading files, hitting the "More Options" button kills the upload process, thus files selected for upload aren't uploaded. Would be an idea when uploading files to disable other buttons on the editor until upload has been successfully complete. "More Options" button could quite easily mean, image quality, sizes, restrict access to, etc. So members are most likely to click it when uploading to see what the additional options are. The button would be more suited as "Advanced Editor". And maybe make a note when members are uploading files to display a warning that clicking other buttons around the editor area may result in losing the uploaded file.