I see that Drupal.org has been down for a few days. This also prevents other drupal sites with shared authentication from logging in users with IDs at drupal.org.
update: There’s some information at http://www.webschuur.com/drupal.org:
And a quick command to “fix” the xmlrpc issue is to get rid of the XMLRPC file. But removing it will give you errors, you should thus replace it with an empty file.
You can use the command
rm includes/xmlrpc.inc && touch includes/xmlrpc.inc