Forum Registration - remembering user data if error
 

Hello,
I am running 4.0.5. If a user fills out the registration form, but submits an incomplete form or puts in the wrong human verification answer, or forgets to click the box to agree to the rules, etc, they are brought to the standard error page saying they must go back and correct the incorrect fields.
However, when pressing the back button, all the fields they filled in are now empty again. This means the new user must fill in all their information for a second time. I have had multiple people decide not to join just because of this...
Is there a way to have the fields "remembered", or having them not leave the registration page until everything is filled in correctly, or something?

Thanks,
Mark