@todd
There is no password requirements for commenting on my site, therefor no password field. I was still having the same issue with Spam Free. I deactivated the plug-in without deleting it and commenting is now available on my site. It was a quick fix and I can still hang on to the plug in and wait for an update that fixes this issue.
I really don’t think it’s an issue with the password field in this case unless spam frees code requires a password to work with WordPress 3.2.1.
I would also think that MOST people don’t require passwords or registration to leave comments as I am only a member of one blog and comment on hundreds.