Think of CPAN as being essentially dumb storage for files, it's not a source code control system. If the modules metacpan page has 'Repository' link on the left hand menu, there should be a link to a working version control system (github/lab etc). Failing that I'd suggest creating a patch (The Ten Minute Guide to diff and patch if you aren't familiar with this) and attaching it to an 'issue' (click the link on the metacpan page, this may take you to rt.cpan.org or some other issue tracker).
Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
Want more info? How to link or
or How to display code and escape characters
are good places to start.