1) It might be useful to add “#” as a character that can come after $permalink_q in case someone is linking to a fragment in your page.

2) $pattern needs the “s” modifier so that the “.” metacharacter will match new line characters.

With the above two changes, the relevant line would be:

$pattern=”/.*/is”;
(or if you blog strips HTML tags from comments: $pattern=”/<\s*a.*href\s*=[\"'\s]*”.$permalink_q.”[#\"'\s]*.*>.*<\s*\/\s*a\s*>/is”;)

3) HTML tags can’t have whitespace between the less than symbol and the tag name nor before or after the “/” of the closing tag (and Mozilla at least doesn’t treat such things as HTML tags). I guess you’re being lenient with people who goof up their HTML? If you don’t want to be that lenient, the pattern would be:

$pattern=”/.*/is”;
(or $pattern=”/<a.*href\s*=[\"'\s]*”.$permalink_q.”[#\"'\s]*.*>.*<\/a\s*>/is”;)

Since installing the TrackBack plugin, once in a while, my friends and even MYSELF (who aren’t spammers) cannot submit comments to my OWN website. Bad Behavior plugin rejects them. When I turn off TrackBack, everything is ok.