I'll do that. Probably releasing the new ver soon (not much updates, just easier to install/reinstall).

Nevermind, I got it. Deleted the poll table in the sql database. Solved the problem. Thanks.

So it works now then? (Or was the solution not to use the poll at all?)

If you enables debug mode (see one of the first lines in include/common.php) and try to post a poll again, what's the error message this time?

PunBB reported: Unable to add column poll to table topics
Database reported: Duplicate column name 'poll' (Errno: 1060).

Can you use for example phpmyqdmin to check if the yourprefix_polls table are installed or not? It sounds like you have it installed
before, or axidently ran the install_mod twice. You could try removing the options-part of the install and see what happens.

Remove from install_mod.php:

$config = array(
    'o_polls'            => "'1'",
    'o_poll_change'    => "'1'",
    'o_poll_multi'        => "'0'",
    'p_guests_poll'    => "'0'"
);
while (list($conf_name, $conf_value) = @each($config)){
    $db->query('INSERT INTO '.$db->prefix."config (conf_name, conf_value) VALUES('$conf_name', $conf_value)")
        or exit(mysql_error().'Unable to insert into table '.$db->prefix.'config. Please check your configuration and try again. <a href="JavaScript: history.go(-1)">Go back</a>.');
}