Last modified: 2005-08-08 15:00:22 UTC
When you select a link in Wikipedia to an Ogg Vorbis sound file (or other Ogg data) that has been uploaded, the resulting data is served with HTTP headers giving its content-type as "application/octetstream". This is not the proper MIME type for this data format, which is "application/ogg" according to the Wikipedia entry on [[Ogg]]. In fact, "application/octetstream" isn't even a proper MIME type at all, since the correct type for "unspecified binary data" is "application/octet-stream", with a dash.
This was fixed a couple days ago. Cached items may retain the incorrect type temporarily.