Well for FYI..was parked on some virgin cement, saw a very small puddle under the bike, knelt down and saw the reserve bottle hose dripping, well take care of it this week when i adjust the valves. bottle was about 1/3 full cold.
Woof - same thing happened on my bike while in storage over the winter. Mine happened around a hose connection near the kickstand (if I remember correctly). Just a couple of drops on the garage floor. I chalked it up to parts expanding/contracting in the temperature changes. Tightened up the hose clamp and haven't had a single drip since.