No editing when picture is stored on NFS?

[Jean-Christophe Dubacq <jcdubacq1 free fr>]

I do not know where it comes from (I had no time to look at the source
code), but I was shown that the edit functions are all greyed out when
the picture is stored in a NFS-imported partition. The user has all the
rights required (he owns the files, the dirs). The icons are just greyed
out.

Did I miss something? I will file a bug if not.