[TYPO3-project-seminars] Wrong Parameter when I am not logged in

[Jochen Detert]

Hi,
I have no english installation, so I translate very free.
When I want to book an event, I get on the loginpage. Next page is an error 
like "There is no event with this number".
I think it is because of an wrong parameter in the URL, but I can't find the 
reason. URL:
http: / / www.meinedomain. de 
/index.php?id=97&tx_seminars_pi1[uid]=6&redirect_url=http%3A%2F%2Fwww.meinedomain.de%2Findex.php%3Fid%3D93%26tx_seminars_pi1%255Bseminar%255D%3D6%26tx_seminars_pi1%255Baction%255D%3Dregister

I think "&tx_seminars_pi1[uid]=6" is too much. Any Ideas where I can 
eliminate this?