1.2.5 No Mime Type Found for File Type
This is an uncommon error that indicates that the name of the file you are attempting to download contains a file extension (such as .xls, .gif, or .mb) that is unrecognized. This error will only occur if you are attempting to download a single file, because the mime type of the file must be known in order to display the download dialog box in your browser.
This is not a fatal error, and you will still be able to download the file, although in a .zip file.
The webmaster is always notified of this type of error and will work on resolving this problem.