Apostrophes are common in location names and consequently in media names referring to those. However, when uploading a file such as "File:Orvieto Chiesa Sant'Andrea aisle view.jpg" a message appears that the name HAS been corrected (which it has not...). Then, upload can be performed successfully. However, such a media can not be updated. Trying to update it with a file "A.jpg" will result in the error message "Upload warning: The file has no extension (like ".jpg")." is given and the upload fails."

Test page created for this: http://commons.wikimedia.org/wiki/File:Test_%27_in_name.jpg

Version: 1.15.x
Severity: major
URL: http://commons.wikimedia.org/wiki/File:Test_%27_in_name.jpg