[TYPO3-seminars] Registration - multiple seats - Error

[Georg Rienzner]

Hi,
I have a problem on Seminar Registration. When the user wants to 
registrate for Muliple Seats he gets an error in the final step of the 
registration.

If register only one person (choosing the option "myself"), everything 
works fine.

If I choose to register for more Person in the Dropdown the fields for 
entering the names appear. I enter all Names (first and Lastname) and 
klick the button to go to the final step. Until here everything works 
fine. But when I want to conclude the registration I'm redirected to the 
step before (where the names of are entered) with the following error 
message:

Please provide the names of all persons to register.

But all fields are filled in.

Thanks for any hint for solving this behavior.

Regards