Last modified: 2010-11-24 09:36:43 UTC
Steps to reproduce: 1) Upload a png file and accept the given Title (say file name is MyMovie.png so title will be MyMovie) 2) Uplaod a jpg file with same file name (different image) and accept the given file name (so file name is MyMovie.jpg and title will be MyMovie) Files can be uploaded successfully.
This does not seem like a bug. In MediaWiki, only the full "Title" is checked for uniqueness, which includes the extension. A Title in MediaWiki looks like: File:My_Awesome_Movie.png And forms part of the URL. In the UploadWizard interface, we are hiding the extension and the underscores/spaces conversions, but it is all added back again, behind the scenes.