I sometimes simply abandon a reply in mid-edit - pretty much a self reap before posting. Using the preview button and actually reading what you have written often aids in such a decision.
The most common source of duplicate posts I've noticed is when a node is posted by Anonymous Monk, then is duplicated by a registered monk. Perhaps a solution to that is to provide a way of changing ownership of the original node so it doesn't need to be duplicated? I guess this could lead to problems with people trying to claim nodes they didn't author so it's not clear that this solution would be better than the (relatively minor) current problem.
Perl is Huffman encoded by design.
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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 How to display code and escape characters
are good places to start.