Can't edit descriptions

Hello.

I can without problems add and edit new/existing issues, but for an unknownreason, I can't edit descriptions. If I try to create/edit a description, I've got the error message :

Your wiki editing privileges have been suspended. Please check your private messages to find out why

I don't have any idea why, and haven't got any private messages explaining it. Is it possible to give me back the right to add descriptions?

Thanks

@foux72: Probably some non standard characters that the editor doesn't like anymore. Which page was it i can probably fix it.