Yes, the same error for Pan Moderator, in .../extensions/pan_moderator/hooks/ed_pre_subject.php when you change post date.
I've changed :
<label for="fld<?php echo ++$forum_page['fld_count'] ?>"><span><?php echo $lang_pan_moderator['posted'] ?></span><small><?php printf($lang_pan_moderator['posted_i'], date("Y-m-d H:i:s", time())) ?></small></label><br />
<span class="fld-input"><input id="fld<?php echo $forum_page['fld_count'] ?>" type="datetime" name="req_posted" value="<?php echo (isset($_POST['req_posted']) ? date("Y-m-d H:i:s", $posted) : date("Y-m-d H:i:s", $cur_post['posted'])) ?>" size="20" maxlength="19" /></span>
By :
<label for="fld<?php echo ++$forum_page['fld_count'] ?>"><span><?php echo $lang_pan_moderator['posted'] ?></span><small><?php printf($lang_pan_moderator['posted_i'], format_time(time())) ?></small></label><br />
<span class="fld-input"><input id="fld<?php echo $forum_page['fld_count'] ?>" type="datetime" name="req_posted" value="<?php echo (isset($_POST['req_posted']) ? format_time($posted) : format_time($cur_post['posted'])) ?>" size="20" maxlength="19" /></span>
Errors are gone too when editing and changing date of posts.