The Selection Tab of the Backup window does not display directory or filename for the NetWare plugin if NetWare 6.5 SP2 or greater is used with UTF8 accented characters. Choosing a higher level directory will not result in these files being backed up.
NetWare 6.5 SP2 introduced UTF8 and new API calls to support them. The existing API calls result in the symptoms reported.
This has been raised as bug 13561 and is in the workflow for development. The release notes of future releases will confirm when this is resolved.