@senixon
Does your solution probably work on a *nix server?

@mvdbrand
Did you try it? Result?

Above fix did not work for me. I have openbase_dir in effect. On Apache 2 with PHP 5 running Fedora Core 4, (Linux) and applied above fix. Still getting same error. All permission are correct.

The function above didn't work for me (CentOS), but this did. It's PHP5 only due to the strrpos usage - that could likely be replaced with strpos with no ill effects for PHP4 users.

  function force_mkdir($path, $chmod = null) {
    if (is_dir($path)) {
      return true;
    } // if
    $real_path = str_replace('\\', '/', $path);
    $parts = explode('/', $real_path);
    
    $forced_path = '';
    $path_start = strrpos($path, 'upload');
    foreach ($parts as $part) {
      if (empty($part)) {
        continue;
      }
      
      // Skip first on windows
      if ($forced_path == '') {
        $start = substr(__FILE__, 0, 1) == '/' ? '/' : '';
        $forced_path = $start . $part;
      } else {
        $forced_path .= '/' . $part;
      } // if
      
      if (strlen($forced_path) > $path_start && !is_dir($forced_path)) {
        if (!is_null($chmod)) {
          if (!mkdir($forced_path)) {
      	die('test'.$forced_path);
            return false;
          } // if
        } else {
          if (!mkdir($forced_path, $chmod)) {
            return false;
          } // if
        } // if
      } // if
    } // foreach
    
    return true;
  } // force_mkdir