Emphasis with `_`

[John Gruber]

David Herren <david at idiomatrix.com> wrote on 05/26/05 at 6:36 am:

> A problem I just encountered with underscores and URLs has to do with  
> any underscores in an url like this:
> 
> here is a [link](http://www.domain.com/my_web_file.html)
> 
> markdown makes the 'web' italic and eliminates the underscores.

I think this is a WordPress bug, not a Markdown or PHP-Markdown bug.
At the very least, it doesn't seem to be a bug here with Markdown.pl.

-J.G.