Bad </p> tag removal

I tested Linodef using FCKEditor (I wich I could use a non WYSIWYG one like BUEditor but some people just can't understand them :) and I had a little problem: a <\p>\n\n tag is inserted that Linodef doesn't detect. I modified a few lines in includes\linodef-filter.inc (arround line 209) and everything works fine :

// ESY (E. Sarrouy, 2009/02/19) Added the following line to remove spaces and other characters ('\n','\t',etc.)
$output = trim($output);
// Remove annoying <p> tag enclosing $output created by line break converter.
if (substr($output, 0, 3) == '<p>') {
    $output = substr($output, 3);
}
if (substr($output, -4, 4) == '</p>') { // ESY (E. Sarrouy, 2009/02/19) changed -5 to -4
    $output = substr($output, 0, -4);   // ESY (E. Sarrouy, 2009/02/19) changed -5 to -4
}