Upgrading troubles

I am having problems with using the nightly build from today…This code gives me this error
Warning: Invalid argument supplied for foreach() in /home2/fairly/public_html/wp-settings.php on line 93
And this is the code from line 91 to 97.
if ( get_settings('active_plugins') ) {
$current_plugins = get_settings('active_plugins');
foreach ($current_plugins as $plugin) {
if ('' != $plugin && file_exists(ABSPATH . 'wp-content/plugins/' . $plugin))
include_once(ABSPATH . 'wp-content/plugins/' . $plugin);
}
}
Anyone know the problem or can anyone help me?