Did anything change with the Piano Synthdef in 3.2?

The problem with the previous one, was that the velocity was internally multiplied by 4, so the default of 0.2 was actually 80% of the maximum, and anything over 0.25 was sending out of range values to the synth.

You can recreate the sound of the old one by using a vel of 0.8, and reducing the amplitude accordingly.