Since updating to KDE 4.9, the categories (nepomuk tags) in the addressbook are no longer working. When I use the dialogue to add a new tag (not existing before), it displays correctly in the contact detail view. However, when I click on the ... button to add / edit the tags, empty tags are selected instead and the existing tags are displayed as unselected below.  

When I then select the correct tags, tags are multiplied.  So when I want to add a tag to a file in dolphin, the same tag exists twice. The duplicates then can't be removed. 

KDE 4.9, Soprano 2.8.0, Virtuoso 6.1.4, Gentoo x86_64 

Reproducible: Always

Steps to Reproduce:
1. Install the above mentioned software
2. Add tags ("Categories") to a contact, save
3. Try to edit / add the tags 
Actual Results:  
Wrong tags selected, duplicates created

Expected Results:  
Correct tags selected, no duplicates