Strange characters at the end of the URL

Hello,

I have a series of strange characters who arrive at the end of each URL article made with the component EasyBlog and only for the blog, all my other URLs are clean.

There is there a technical reason?

Because on another website with the same component I do not have this problem...

Here you are an exemple :

http://www.rosesrock.com/blog/trophee-roses-des-sables-2015/15-days-to-go#.VgetIs6zg5k

#.VgetIs6zg5k : where do these strange caracters ???

Thank's by advance

Best regards

Alain