When I try to run jEdit I have this problem:

(.:5957): Pango-WARNING **: Invalid UTF-8 string passed to pango_layout_set_text()
[error] AWT-EventQueue-3: java.lang.InternalError: Pango: Invalid UTF-8 string passed to pango_layout_set_text()
[error] AWT-EventQueue-3: at java.la
[error] AWT-EventQueue-3: ng.reflect.Constructor.newInstance(libgcj.so.7)
*** glibc detected *** double free or corruption (!prev): 0x0820c168 ***

Is there any relation with the language of my system?
LANG=ca_ES.UTF-8
LANGUAGE=ca_ES:ca:en_GB:en

I do an export of this two variables trying other most typicall languages (english) but it doesn't work anyway.

How can I solve that? I'm using kubuntu.

Thanks