Excessus, yes.. its based on substracting the blurred depthmap from the unblurred one. thats why the edgebleeding is occuring,

here is the nodes image i based it on: http://mpan3.homeip.net/content/resources/ssao1.jpg

i need to find a way to prevent that damn edge bleeding... at least i'll see what happens if i get a real smooth blur. could be a nice scene effect