For everyone having trouble with special characters in forum names and descriptions,
FIND (on or around lines 193 and 194 of the original script)
$forum_name = $row;
$forum_desc = $row;
CHANGE TO (adding the addslashes() function)
$forum_name = addslashes($row);
$forum_desc = addslashes($row);
And that should resolve most of the complaints I’ve seen here about the conversion failing.