- run mp3tag in a given directory
- open a media file in this directory with a second application, f.e. winamp or ultraedit
- change the tag data of the file
- when attempting to save the tag data, a modal dialog will popup informing you that the file cannot be opened for writing
- choose ok and open the directory in the browser
-> You'll find an additional tmp file in the directory which must be deleted manually. Otherwise it will stay there forever.