[horde] After upgrade, JavaScript detection problem

[Michael]

Hi,
I just did a pear upgrade of the Horde installation. Since this  
upgrade I can only use the minimal view. The message I'm getting after  
login is:

"JavaScript is either disabled or not available on your browser. You  
are restricted to the minimal view."

When I open the Mail application, it looks like it does not load the  
CSS file. It's the same for the Calendar application. Addressbook  
looks fine.

Both logs, Horde and Apache do not show any errors.

What can I do to solve this issue?

Thanks,
Michael