Can't Restore backup Error: No such file or directory - /tmp/sugarcrm5-dump

We just discovered that we can not restore our backups.

So far I have two different apps and three machines that I have not been able to restore.

bugzilla-1.1.16 -> bugzilla 1.1.18
sugarCRM5-1.1.17 -> sugarCRM5-1.1.18
sugarCRM5-1.1.17 -> sugarCRM5-1.1.17

In every instance, we get the error message:

Error: No such file or directory - /tmp/sugarcrm5-dump
(of course it was bugzilla-dump for bugzilla)

We have 10 days of backups and none of them will restore.

I have also created a brand new install of sugarCRM-1.1.18, done a backup and then tried to restore it without success.

These are running on an ESX3.5 server with an iSCSI datastore.

The backups are sent to a samba share.

I have also tried copying the backup to my PC and doing an "Upload a file" restore with the same results.

Have it working now

We updated the samba server to Ubuntu 10.04 and samba 3.4.7. Now backup and restore both work including the ability to restore backups made before the update.

Strange.

I guess it was that particular version of Samba causing all the trouble.

More information

We have been successful in doing a backup and restore using only the Upload/Download options (not using the samba share).

We have been successful using a different samba share on a different set of hardware.
The difference between the two shares:

The working share has a user "nobody" with no password running on a very old RedHat 9 with samba 2.27a

The non-working share is on Ubuntu karmic with samba 3.4.0

Running a backup never shows an error, only restore fails. We have tried to manually extract the data from the backup. First we unzip it which results in a tar file. When we try to tar that file, nothing happens. Tar doesn't even give an error.