I don't think I would *ever* have thought of that. What good thinking !!
So ... when I append a (random) query string to the URL I get the "new" file, but when I omit the query string I get the "old" file.
This surely demonstrates that it's a caching issue, but is there a way for me to pinpoint the location of this cache ?
If wget is accessing a cache on the local linux machine, where would that cache be located ?