coolant leak
 

Noticed some green radiator coolant splashed on the frame of the bike this evening (naked k6). Looks like it had bubbled over the cap. I'd been in some heavy traffic on the commute home but temp never got above 90 and there were no noticeable performance issues.
It's just come back from the garage after a recent off and the radiator cover and cap have been replaced. Forgive my ignorance but does this indicate a poorly fitted cap or a more serious problem?