This usually happens with umlauts and accents, because these characters were particular to the code page that was previously in use.
这通常发生在变音符号和重音符号,因为这些字符是此前使用的代码页特有的。
The server revision was upgraded to the newest BOINC revision today. There are some errors concerning the charset still, so umlauts aren't displayed correctly in the forums.