Don't worry, I wasn't offended in the slightest; it's a source of endless frustration for me. I had thought about the regulator being faulty, but didn't really know of it was possible? What is odd is that if the bottle is turned on, and I pour some drinks, when I've finished I turn all the outlets of the manifold, and turn the gas off at the bottle, so the reg, line to the manifold, and the manifold are pressurised but not being 'fed' by any new gas, it slowly leaks out until, suddenly, the pressure guage (the line one, not the bottle full / empty one) starts rising and the pressure release valve opens and vents all the gas. However, this only happens if the reg is left set at whatever pressure I've set it at (usually 30psi as I have secondary regulators) , if I dial the pressure down then turn the bottle off, it just slowly leaks out. Odd.