There are more aircraft who give an occasional chirp from the stall warner when climbing out. It takes only a very small gust of wind when you're climbing 10-15 knots above stall speed to trigger a sensitive stall warner.
Yes, you heed the warning, so check your airspeed, give the aircraft an extra five knots, but don't panic over it.
If you fly the aircraft to the POH values for Vr, Vx, Vref and touchdown speed for short-field take-off and landing, you'll find that it's virtually impossible to do this without the occasional trigger of the stall warning.