So, habe die Lücke entdeckt:
Ich soll laut Einbauanleitung diese Geschichte hier machen in der functions_post.php -->
#-----[ FIND ]---------------------------------------------
#
$sql = (!$post_data['has_poll']) ? "INSERT INTO " . VOTE_DESC_TABLE . " (topic_id, vote_text, vote_start, vote_length) VALUES ($topic_id, '$poll_title', $current_time, " . ($poll_length * 86400) . ")" : "UPDATE " . VOTE_DESC_TABLE . " SET vote_text = '$poll_title', vote_length = " . ($poll_length * 86400) . " WHERE topic_id = $topic_id";
#
#-----[ IN-LINE FIND ]---------------------------------------------
#
vote_length
#
#-----[ IN-LINE AFTER, ADD ]---------------------------------------------
#
, vote_max, vote_hide, vote_tothide
#
#-----[ IN-LINE FIND ]---------------------------------------------
#
$current_time, " . ($poll_length * 86400) . "
#
#-----[ IN-LINE AFTER, ADD ]---------------------------------------------
#
, '$max_vote', '$hide_vote', '$tothide_vote'
#
#-----[ IN-LINE FIND ]---------------------------------------------
#
vote_length = " . ($poll_length * 86400) . "
#
#-----[ IN-LINE AFTER, ADD ]---------------------------------------------
#
, vote_max = '$max_vote', vote_hide = '$hide_vote', vote_tothide = '$tothide_vote'
An dem dick markierten hängt es - dann DAS finde ich gar nicht in meiner Datei - die bis hier so aussieht:
$sql = (!$post_data['has_poll']) ? "INSERT INTO " . VOTE_DESC_TABLE . " (topic_id, vote_text, vote_start, vote_length) VALUES ($topic_id, '$poll_title', $current_time, " . ($poll_length * 86400) . ", '$max_vote', '$hide_vote', '$tothide_vote')" : "UPDATE " . VOTE_DESC_TABLE . " SET vote_text = '$poll_title', vote_length, vote_max, vote_hide, vote_tothide = " . ($poll_length * 86400) . " WHERE topic_id = $topic_id";