File name extension being added

Why does serviio add the file name extension .mov to my Divx .avi files. For example Movie.avi becomes Movie.avi.mov
The file is then unplayable in my UpNp client.

[Illico]

Why does serviio add the file name extension .mov to my Divx .avi files.

Where do you see that ?
Serviio does not change the source file !

When I access the file on my DLNA client (KWorld)

[zip]

Serviio doesn't do that, but I read some clients do that - probably based on the mime-type. Pretty rubbish...

There is no problem when I use Windows Media Player as the server. By the way, the .mov extension is not added to the file on the source PC.

Obviously no one can help me. Goodbye Serviio.