Text() and ViewPort() bug?

Hi,

I was playing a little with the Text() command and discovered something wierd.
If I create a boundary on the right side with Viewport, and use a loaded font(Arial), and the textstring includes non-english characters, the clipping doesn´t quite work properly.
Sometimes it can´t print non-complete letters.

Is this a known bug? Or did I just "get lucky"? ;)