[skrebbel]

Ahyes, smart. We didn't control the client, unfortunately, so we couldn't do that.

(we tried to communicate with the people who did but they turned out to be the supplier to the supplier to the customer of our customer, 5 countries away, and fixing anything at all was not high on their priority list :D)

[NicoJuicy]

Afterwards change the extension to .xmlok or .xmlfail (alt: zip it), no need for vendor adjustments