German 'Umlaut' not supported with Java 7u60

A user reported the following: "German 'Umlaut' (ü ö ä Ä Ü Ö ß) are not supported by Java 7.60. The same problem occurred with Java 7.55. The last version that didn't have these problems was Java 7.51. All versions have been tested by me on Mac OS X 10.9."

Java version: Java 7.60

Full OS version: Max OS X 10.9.3 Mavericks

Browser: Safari
 
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.76.4 (KHTML, like Gecko) Version/7.0.4 Safari/537.76.4

Hardware 64bit