404 error when Permalink is set to "Month and name" and post title is a number

[florin.ochiana]

In admin i selected "month and name" option in the permalink section. So the links are like this
​http://blog.domain/2009/04/sample-post/

I discovered the bug when i posted an article with the title "7". So the link of the post was
​http://blog.domain/2009/04/7/

Wordpress returns "Error 404 - Not Found"

After I replace the title from "7" to "7 somth", wordpress showed the correct post.

My wordpress version is 2.7.1.

[Denis-de-Bernardy]

closing as dup of #9191