#134 Copy-Paste of PloneArticle breaks for attached PloneExFile

[Anton Stonor]

I have an PloneArticle with an PloneExFile (using
FileSystemStorage) attached. When I copy and paste the
PloneArticle, the file is not copied: The file appears
to be copied and the Word preview is available, but not
the file itself:

It throws an error such as:

[Errno 2] No such file or directory:
'D:\\zope-instance\\var\\fss\\638e316b9ab2a974d2940c1b4f8ae661_file'

Copy & Paste of PloneExFile outside of PloneArticle
works fine.

Anton