users forced to reset password I'm on 7.39 and I get a lot of reports from users that re forced to reset their password every time they visit the site.

I'm honestly clueless about how to debug and haven't been able to find similar support requests on the forums.

Any ideas are extremely welcome

update
Here's feedback from a user that couldn't even reset:

*If I use this link: http://www.tambourhinoceros.net/user/user-id/orders/order-id:


  You are not authorized to access this page.


If I try to login ... with this e-mail adress and my password ... nothing happens.
If I request a new passwort this message
appears


  There was a problem with your form submission. Please wait 6 seconds
  and try again. You must be a human, not a spam bot, to submit forms on
  this website. If you insist that you are a human, please try again. If
  error persists, contact webmaster using contact link at the bottom of
  this page and give all the details of this error (your browser,
  version, OS). Form is submitted too fast. Please spend more time
  filling in the form.


*
You could use the Password Policy module to manage your password policies.