Just to add, if you want to 'fail safe' a breadboard design, your better off assuming ~25pF of stray capacitance per breadboard insertion point. You should also make sure your circuit bandwidth is less than ~8-10Mhz, keeping in mind that if you have an opamp with GBP of 20Mhz and you're using it with a gain of 2, you may have a problem. Stray inductance can also play a part, but it's far less likely.