I'm using rails 2.3.5 and Authlogic in our website, and I have been getting errors on the database through hoptoad of users with duplicated emails trying to be saved. The problem is, obviously I have the `validates_uniqueness_of :email` on the model.

On my tests here in development I get the expected validation error and the user is not saved, but in production, I keep getting this errors on the DB layer.

I've tested with case sensitive emails and it also validated correctly.

I've checked and the class and there is no attr\_accessor or any other attribute override, and I don't think Authlogic would do it in a wrong way...

What could be happening in production? Are there any cases where rails validates doesn't work?