Yes i saw a post about that
i was riding through london with thousands of other bikes so the engine was hot, and the amount of petrol that poured out and over the headers i don't know how it didn't burst into flames.
It stopped when i removed the cap and the level was a couple of inches down from the neck, it started to do it again when i refitted the cap?
seemed ok on the ride home, but i made sure i left plenty of space in the tank after re fueling.