jQuery 1.3.2, jQuery UI 1.7.2 | Tabs in a Dialog Window jumps up!

jQuery 1.3.2, jQuery UI 1.7.2 | Tabs in a Dialog Window jumps up!


Hi there!
I'm using jQuery UI Tabs/Dialog Boxes on one of our sites.
The Tabs are inside an Dialog Box. If i click on an Tab, the whole
content inside the Dialog Box jumps up for about 5 Pixels every click!
In IE7, IE8, Firefox, ... the content jumps up till i reach the border
of the Dialog Box. But in IE6, the Content jumps up every click. So,
on the 10th click i can't see the orange title-box anymore!
How can i fix this? Is this a bug?
Here's the site where this is happening:
http://www.rb-fenster.de/index.php?option=com_content&view=article&id=7&catid=1&prod=ideal8000kk&Itemid=21#tabs-1
(Click on the 2nd "Sprossen OrnamentglÃĪser")