Can someone tell my why this rss2 doesn’t validate

You have very strange URL, e.g. for a single post:
http://dotnature.com/index.php?option=com_jd-wp&Itemid=46&p=14

I have been looking for an answer to this and I’m sure my problem with my rss2 feed is the one mentioned by Yngwin.

I have a question, how do you encode automatically “&” as “&”?

You see, the problem I have is that the posts in my blog come from different sources, and I like to point the visitors to the original post in the original blog that wrote such article or post.

Many of those sites have “&” in their link structure and that’s why I have the errors when validating.

I don’t know if I was clear enough, english is not my mother language.

Thanks in advanced,

This is probably a bit late to be useful to you, but i also had the same problem and here’s how I fixed it:

I modified the function the_guid() in line 53 of
wp-includes/template-functions-post.php

it started as :
function the_guid( $id = 0 ) {
echo get_the_guid($id);
}

and I changed it to:
function the_guid( $id = 0 ) {
$guid = get_the_guid($id);
$guid = eregi_replace('(&)(.{3,6}[^;])','&\2',$guid);
echo $guid;
}

then everything was suddenly valid.