Apparently the behavior of the red linked thumbs has changed
Includes an image thumb since deleted. The thumb shows a redlink, leading to: http://en.wikipedia.org/wiki/Wikipedia:Upload?wpDestFile=MinervaSapienza.JPG
wpDestFile is an argument to Special:Upload of course, not Wikipedia:Upload.
Also, a second problem is that for editors it is now impossible to see the file history of that page. It should probably only ever link to the upload interface, if a file by that name did not exist at any point in time. For editors, the description page for that file is very hard to reach now for instance. You have to manually copy paste the image title and navigate there. I also note that the "magnify" icon is not available in these thumbs.