Font-headers in photslide gk3 in ie 7

Hi,
i'm using j 1.5.22, corporate 2.0.15, photoslide gk3.
in ie7 the head-fonts is not the same as in firefox, chrome, safari, also in the mainmenü is the same problem.
The same shown on the demo-sites.
Where can i change the fonts.
Thanks.

screen ie7.jpg

screen settings.jpg