I did the same as marius, but instead of overwriting the _prepareCollection() , i overwrote the setCollection() like this

public function setCollection($collection){
        $collection-&gt;addAttributeToSelect('manufacturer');
        $collection-&gt;addAttributeToSelect('visibility');  
        parent::setCollection($collection);
    }


This made the code a lot shorter. I don't know if there are any side effects.

How to add special price to category products grid?
I seem to remember reading that there were going to be three trilogies originally in Star Wars, i.e. they would add episodes 7 - 9.

Was that ever the case? What happened to that plan?

Update: looks like that original plan might be back after all!
