Here a short feedback: The preconfigured Time-Servers are available again in the english version of Time-Sync and therefore the problems are solved.
Time-Sync Servers
03. March 2012
The preconfigured Time-Servers partially are not available in the english version of Time-Sync. This problem can be solved by adding a new Time-Server "pool.ntp.org" as first entry in the server configuration. After this reconfiguration Time-Sync will work with this new server and your time will be synchronized as usual.