[imp] imp folders in horde-menu not collapsable?

[Oliver Kuhl]

Jan Schneider wrote:
> Zitat von Oliver Kuhl <okuhl at netcologne.de>:
> 
>>in my HEAD installation the folders in the Horde menu are collapsable
>>since month. Now I installed the latest stable version on another server
>>for testing and they aren't. I searched the mailinglist archive and the
>>settings dialoges of Imp and Horde and couldn't find anything here. Did
>>I miss something?
> 
> Works fine here.

...and always worked here, too. This is why I'm a bit confused. Here is
a screenshot of the problem:

  http://www.okuhl.mynetcologne.de/horde/foldermenu.png

The rest of the menu works fine. JavaScript, etc. is no problem then.

Regards,
    Oliver.