How do I use unicode characters in FitNesse fixtures?

I'm testing the workings of a unicode-scrubbing routine using FitNesse, but the unicode characters I enter in the decision table don't make it through to my fixture.

The decision table looks a little like this,

|first name before|last name before |first name after|last name after  |
|Władysław        |Belina-Prażmowski|Wladyslaw       |Belina-Prazmowski|

but setters in my fixture get called with

W?adys?aw

and

Belina-Pra?mowski

where I would have expected multibyte characters (yes, that ac开发者_如何转开发tually is a '?' character).

How can I instruct FitNesse to pass these characters on as unicode?

Here it works without any particular problem. Check to have unicode as system charset and in java enviroment.