1
For have all date format equal, i have modify file include/findusers.php
From:
<td align='center'>" . ($foundusers[$j]->getVar("user_regdate") ? date("Y-m-d", $foundusers[$j]->getVar("user_regdate")) : "") . "td>
<td align='center'>" . ($foundusers[$j]->getVar("last_login") ? date("Y-m-d H:i", $foundusers[$j]->getVar("last_login")) : "") . "td>
<td align='center'>" . $foundusers[$j]->getVar("posts") . "td>";
to:
<td align='center'>" . ($foundusers[$j]->getVar("user_regdate") ? date(_SHORTDATESTRING, $foundusers[$j]->getVar("user_regdate")) : "") . "td>
<td align='center'>" . ($foundusers[$j]->getVar("last_login") ? date(_MEDIUMDATESTRING, $foundusers[$j]->getVar("last_login")) : "") . "td>
<td align='center'>" . $foundusers[$j]->getVar("posts") . "td>";