I know this is an old message, but someone may find it in a search like I did.
The CGI module spec doesn't disagree with the W3C spec for the FORM tag. They're not referring to the same thing.
In HTML, the action property of the form tag is not optional. If you want to, you can leave it as an empty string (action="") and you will still pass the validator.
In CGI's start_form() method, the action method is optional. If you don't define the action property of the start_form method, it will create a form tag with an action property that points to the current script.
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.