sudweb/wp-sudweb-theme — comment on commit 2fb35dfd422f0ba55ea6a1205366757a07b8b268
File:  line 0
By DirtyF:

The URL has changed to http://sudweb.fr/2012/participer/inscription/ but the generated link is http://sudweb.fr/2012/participer/inscription/%E2%80%8E

seems like this is a bug as mentioned here : http://wordpress.org/support/topic/bad-page-suffix-in-url