Problems after latest WP upgrade

Hello – this plugin worked great for me until this morning. I am running a multi site, version 3.2.1.

After upgrading to 3.2.1, I suddenly could *not* login into any of my sites. If I deactivate, all works well (i.e., login directs to wp-admin)….

When Activated, the login password field just clears (not shaking like it’s invalid, just clears itself) and the url direct looks changes to this:

https://mysite.com/123/subtestite/wp-login.php?redirect_to=https%3A%2F%2Fmysite.com%2F123%2subtestsite%2Fwp-admin%2F&reauth=1 – which does nothing….except clears the password field and just sits there like a lump on a log 😉

So I’ve deactivated it for now. But curious as to what I should do – I really like this plugin, and need it for several sites I’m running.

Any thoughts?
Thanks!