[Plugin: GD Star Rating] Multi not being rendered

I’m having a hard time with this one. After all the documents, tutorials and checks, multis stil don’t appear.
The normal rating post displays ok.
I’ve created a multi Set and on one article I created the sevral ratings for each of the five categories. I can see in debug.txt that the insert commands were issued to the db and the values are there.

However, inserting the shortcode [starratingmulti id=”x”] on the page does not render the block.

The shortcode is removed from the html source sent to the browser. Parsing of post content is happening. No call is issued to the Db and render_multi_rating() function is not called at all (I’ve inserted a debug cmd there and nothing is written.