Ok... lucky for me "ridicule doesn't kill", because I would be dead right now
(And thanks to David for helping me).
I thought I had trashed the corrupted app - Image Capture- but I didn't.
I did trash "Capture.app", the one that allows to make screen capture, and that was the wrong one.
Why ? Because Spotlight finds the only "Capture" app on the french version of Tiger.
The one that was corrupted could not be found, by me or by Spotlight, since its name is "Transfert d'Images".
It's the app that allows to transfer photos from your camera.
That's a weird translation, to say the least, from english to french : "capture" = "transfer" ?
Anyway, I trashed the newly found "good" app, and SuperDuper! worked fine.
One last advice for the
french speaking readers of this forum : go see the Cmd-I informations, it gives the "original" name of the app.
Hope this helps