This is similar to not holding
content by custom fields, but concerns the regular ones.
So, imagine this situation:
You forgot to login, and you want to post an ad. You provide all the needed information including your email. This email is assigned to an registered account. Then you click the 'post ad' button.
You will get an error (in flash message) stating that
A user with that email address already exists, if it is you, please log inl . And the login form will be presented to the user. User now logs in and is taken to the 'post ad' form. Some of the fields are empty, i.e. location, ZIP, transaction, condition.
I think this shouldn't happen, and all the fields entered by the user before login should have the entered content.