I read this thread earlier today and I have to admit that I skimmed over the bit about == comparisons and then just now I was reading about the back door attempt on the Linux kernel and way down there in the comments (sorry I can't see a way to link directly to it) are two comments by "legobuff" and "Mr_Z" on the exact same topic. A real world example how a simple change in coding practice can potentially make a profound difference (presuming of course some-one writes the auditing tools). ++tilly its a good meme to spread.