Today Synology released a new firmware version (2.0.0839). It is recommended to install this version because it will fix a security issue.
DSM 2.1-0839 fixed a security issue by disallowing general users to access other users’ home folders through Samba. Users who are using the User Home Folder feature are encouraged to upgrade to the current version.
For File Station 2, DSM 2.1-0839 enhanced progress display when copying files and download handling for Internet Explorer 8, and fixed the failure of setting group privileges for sub-folders.
For Download Station 2, DSM 2.1-0839 improved special character handling for eMule service and fixed error download progress when download is finished.
DSM 2.1-0839 applies to the following models: DS209+, RS408, RS408-RP, DS508, DS408, DS108j, RS407, CS407, CS407e, DS207+, DS207, DS107+, DS107, DS107e, and DS-106j.