Small drips from the carb are fairly normal and are caused by the plunger not seating or being held open by a piece of crud. Make sure the regulator is clean.
Releasing the pressure is a band aid, but it does work.
Just for grins, screw the regulator screw in 1/2 turn and see if the engine still runs ok. If it does and it stops the drip, you are home free.

Dave