[Samba] Excel files

[Meli Marco]

Hi,
I'm using samba 3.0.13 release with acl support enable and I have encounterd
the following problem:
When I try to save an excel file (only excel file, word documents an others
works fine) it answer me that it can't save the files and create a new
temporary file with no sense name and no extension.
It could be depend by any new configuration in smb.conf file features,
previous I have installated 3.0.7 release.
Where I looking for to solve this problem?
Thanks.
Marco.