“Babes” word in a category link. Is a bug?!

Hi,
I’ve a problem with my Blog. For example, I’ve just published a post. I’ve inserted it a category called “Security”. When I had published and I go in homepage, I see the post correctly published but near “Posted into” Security category is written two times: one correctly and one that link to http://myblog.xx/babes/security. What is it? Is a bug? Anyone have an idea?

Thank you very much.