[Andreas]

Uuh! I fear you're right.

Please try this Plugin Code instead and let me know if it does work correctly

PHP Code:

if (!$this->cache['year'])
{
    $this->cache['year'] = vbdate('Y', TIMENOW, false, false);
    $this->cache['month'] = vbdate('n', TIMENOW, false, false);
    $this->cache['day'] = vbdate('j', TIMENOW, false, false);;
}
if (empty($this->cache['hasbday'][$this->post['userid']]))
{
    $birthday = explode('-', $this->post['birthday']);
    $this->post['hasbday'] = (($birthday[0] == $this->cache['month']) AND ($birthday[1] == $this->cache['day']));
    $this->cache['hasbday'][$this->post['userid']] = $this->post['hasbday'];
}
else
{
    $this->post['hasbday'] = $this->cache['hasbday'][$this->post['userid']];
}