Yes, I have noticed some gas around the carburetor after shutting down. I have started to shut off valve off before getting into the garage and letting it run a short time to lower the fuel in the bowel. Stopped the gas smell.
I spoke with my rebuilder about this minimal leakage. The issue seams to be with the brass coupler that the fuel line fits into. The rebuilder says he uses a dab of super glue. Don't know about that, but I use Hylomar and it takes care of the small "nuisance" leak.