Inlet Manifold Gasket - F430 Spider

Wondered if anyone else has had this problem. I noticed a strong smell of petrol on the overrun after rapid acceleration with the top down. Took it to the dealer who road tested and agreed. After 2 weeks of investigation (thankfully under warranty) they found a leaking inlet manifold gasket, so changed them all (as a precaution) and now all appears fine. They said this was the first they'd seen and Ferrari were also surprised. Some weeks later I was about to report a faulty petrol gauge, but turns out the fuel consumption had improved so dramatically, I wasn't used to the gauge going down so slowly, so the gasket was probably blowing for some time!