Yeah I beleive I have heard before that it was missing.
Just copy and paste this into a text file and then name it Skins.php and upload it to the sources directory:
<?phpglobal $modSettings,$settings,$username,$sourcedir,$imagesdir;$requestskin = mysql_query ("SELECT skin FROM {$db_prefix}members WHERE (memberName='$username')");$skintemp = mysql_fetch_row($requestskin);if ($username == "Guest") { $skinscsslocation = "$modSettings[skinDirectory]/$modSettings[skinAdmincenter]/skin.css";print <<<EOT<link rel="STYLESHEET" type="text/css" href="$skinscsslocation">EOT;}if ($username != "Guest") { if ($skintemp[0] == "") { $skinscsslocation = "$modSettings[skinDirectory]/$modSettings[skinAdmincenter]/skin.css";print <<<EOT<link rel="STYLESHEET" type="text/css" href="$skinscsslocation">EOT; } else { $skinscsslocation = "$modSettings[skinDirectory]/$skintemp[0]/skin.css";print <<<EOT<link rel="STYLESHEET" type="text/css" href="$skinscsslocation">EOT; }}?>