I still have another problem to solve. I'm using the BobV3-Theme from http://www.blogohblog.com.
There you can find a great theme feature, that scrolls down the article you click on. To my mind, a very good AJAX-application to the theme.
Unfortunatelly this freature deativates after installation of the Lightbox 2-Plugin. Maybe, you can help me, solving that problem, because I don't know, what to do ...
Greetings from Berlin