[Isomorphic]

These changes have now been ported to the 3.1p branch and will be present in nightly builds as of tomorrow (8 Feb).

[basis.cedric]

Just tried with 2013-02-08 and the problem was solved. I was able to upload files with accented characters and spaces in the name.
The issue with nativeName was resolved too.
Thanks,
Cédric.