Okay, that was the second meaning I was thinking of.
It's just that I don't want to swap the placements of the two components, which I had to do in order to use the large one at the ADJ pin. Not because I'm lazy, but because I don't think it really pays off (It would really be neccessary to change nearly everything, then).
I'll experiment with larger values for the ADJ bypass cap when I have the board working.
That's no problem anyway, as I could just put any smaller value in there. There is room for experiments with anything from 0 to >470uF.
Whoo, that's bad!
I've never experienced such things (once again: I'm not concerned about the sound of a tantalum at the ADJ pin at the amp's output, I wouldn't even expect it to be measureable).
Actually, it should only depend on the regulator's output voltage, as the voltage across the cap is Vcap = Vout - Vref, which would certainly be ca. 25V - 1.25V or something alike.
I've choosen 35V types, which should be save, as the currents involved are in the sub-milliampere range and the cap is 'overvoltage-protected' by the diodes.
Anyway, I appreciate this opinion, Carlos. I'll test it out.
Any further opinion about schematic and board are welcome!
Sebastian.