I administer a site that has open user registration, but requires email verification, has a number of required user profile fields in the user registration form, and is protected by mollom text analysis (retain).
Like others (see, I'm seeing a lot of user registrations that appear to be generated by real humans, yet the information they post in their required profile fields in the user registration form is clearly spam. However, NO records are created in the mollom table for these (or any) user registration forms showing they have undergone mollom text analysis or been identified as ham or spam.
I've worked with Mollom directly, but we have traced this issue back to the drupal mollom module as it appears it may not be successfully analyzing profile fields in the user registration form.
Drupal 6.20 | MySQL database 5.0.51a | PHP 5.1.6 | Web server Apache/2.2.3 (CentOS)
PASSED: [[SimpleTest]]: [MySQL] 2,150 pass(es).
FAILED: [[SimpleTest]]: [MySQL] 1,990 pass(es), 1 fail(s), and 1 exception(es).
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch mollom-HEAD.profile-register-test.1.patch.