Fine, that worked. Thanks!
I'm having the same situation with Seam 2.1.1.CR1...
Any clue ?
@Nico Wollenzin could you explain how you fixed the problem please
If you are dealing about special characters in page parameters and/or URL, you should add the uri-encoding="ISO-8859-1" to Seam Manager properties in your components.xml, see JBSEAM-4330:
<core:manager uri-encoding="ISO-8859-1" ...>