Authorization error when trying to commit plugin updates via SVN

Anyone experienced this as of late? Went to commit some plugin updates (using Versions) and I’m being denied by the server. I have double- and triple-checked my credentials, using both my old WP forum password (from before the great WordPress password reset of June 21st, 2011) and my new password I was given.

I’ve found multiple older posts with a similar issue, some resolved by ensuring case-sensitivity in usernames (not the case here), and others left unresolved completely.

It sure would be great if there was a direct support link for plugin devs somewhere that pointed us to someone who actually controlled repo access for svn.wp-plugins.org and could troubleshoot issues like this for us. As it stands, I’m dead in the water, unable to push out plugin updates.