Pulldown menu dissapears and pictures higher on page

Hi,

I installed V1.7.3 but the pulldown menu dissapears when selecting this menu.
That should have unfold itself over the picture.

Also the pictures went lower on the page.

So I went back to an older version ( V1.6.4 ). Then it works, but I would
like to use the new version.

If I have to manually edit files and upload them with ftp, this is no problem
because I have ftp access.

Regards,

rp