Wny Linux sends unicode keyboard events while Windows sends ANSI

Unde linux, the foreign keys such as ü Ü do not seem to work with this code:

String.fromCharCode(e.charCode).toLowerCase();

The output is wrong under Linux, but Windows is Ok.

Here is sample page to debug this: the output of foreign keys such as ü with Linux looks same here, totally broken, two chars appear: http://www.bgxcomponents.com/flashValidateRegExp.htm

Could be this Flash Player bug.