I discovered a problem when a PowerPoint document is uploaded in a file.
When I load the file with the download link on the folder view, I can download the PowerPoint document, but when I try to load it from the file view (by clicking on the document link in the file) I got an error.

This fault occurs only with Internet Explorer and PowerPoint documents. No problem with Firefox and with Google Chrome and other file type.

I can see that the link provided by Internet Explorer is not the same with the two kind of download (folder view or file view) and only for PowerPoint documents.

What could be the problem with IE ?