Coolant drip

A week ago I had my '08 Kawasaki Vulcan Nomad 1600 transported (along with my wife's car) from Texas to Arizona. The drivers were pros and had lots of experience (they told me) in transporting bikes. But they had to push it up a ramp and lower it by hand since wouldn't drive the bike on that narrow ramp (big, multi-vehicle auto transport).

Now, there's a coolant drip via the overflow tube. It's been there for a week, maybe a drop a day. Should I worry about this or is it the result of tipping during loading and unloading and maybe there's a bit of coolant that got into the tube and is slowly working its way out?
It is from the tube, and there are no signs of coolant anywhere else on the bike.

Thanks.