let alone exceptions, my advise on bucket size is: 32 for 32-bit machines, 64 for 64-bit machines. Reducing bucket size make less memory consumption and longer render times.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though