[horde] left sidebar is on top of module content

[Jouko Nikula]

I've just installed horde. The test page looks good, but on every
module with the left sidebar I have same problem: The sidebar is on
top of the module contents. For example on ingo filters the sidebar is
on top the filter list, making filter list only partially visible.
Same happens on address book etc. Problem occurs at least on firefox
and chromium. However, on http://demo.horde.org the sidebar is shown
correctly.

Please, any advice, what is wrong in my installation?

Regards,
Jouko Nikula