[TYPO3-dam] No Page Tree in DAM File Chooser Pop Up

[Lina Wolf]

  I am running TYPO3 4.3.5 with dam 1.1.1 and  dam_ttcontent  1.1.0

The project has been running since a longer time without problem, but 
dam is newly installed.

When I try to add a dam image to a content element, the dialog in the 
popup Box is missing the filetree on the right. Screenshot here:
http://typo3-blog.net/fileadmin/user_upload/bugs/tree_missing.png
In the uploads area the tree is visible
http://typo3-blog.net/fileadmin/user_upload/bugs/tree_upload.png

It is possible to search for files etc.

Does anyone know weather this is a bug or I just configured something 
wrongly?

I found a Bug here but got the feeling its not related: 
http://bugs.typo3.org/view.php?id=12028