TOPIC: double header

with dtregister i had some problems :
i could not install it normally, so i had to instal it with tmp method.

then my links bring me to 500 error, and my hosting said the error is "[Wed Jan 02 16:11:23 2013] [error] [client 212.198.249.20] FastCGI: comm with server
"/usr/local/httpd2/php-tools/php5_fsockopen.fcgi" aborted: error parsing headers:
duplicate header 'Content-Type', referer: http://www.mieuzen.com/accueil "

what should i do ?
is it joomla or dt register or the hosting ?
thanks

Getting the same issue using Joomla 2.5, DT Register 2.8.11 running PHP 5.3.12 FCGI.

My log shows:

FastCGI: comm with server "/cgi-local/php5.fcgi" aborted: error parsing headers: duplicate header 'Content-Type'

This was posted over a year ago with no response? Hello? Paid customer needing assistance!