Well, I didn't say P6 doesn't still have problems ;-) I know, it's frustrating. The tips I gave you were to help you out until we can get a new update. Who knows when that is coming, so we may as well make do for now. As far as the bucket size, yes, it does increase resources the higher the number. It is actually a 1:1 ratio with MB of RAM. The reason I suggest upping your bucket is this. By increasing the bucket size, you allow a larger area of the image to be rendered during the same operation. So if you have a scene with many shadows, or lots of detail, etc. the engine can make less total calculations, as opposed to doing each one a little bit faster. I am actually trying an experiment with a size of 256 right now. I will post my results when it's done. Hope this helps!