Link-texts jump on mouseover

Hi,

I came over a strange problem on my site http://www.x-tension.at
In the text scrollers in the section crew -> musicians -> vocals the email- and download-links “jump” to the right side on mouseover! The texts are loaded via xml and are formatted using CSS. But there is absolutely no rule that would imply such a behaviour…

Has anyone experienced such a phenomenon before? If yes, what could be the reason for that?

best,
Juergen