csound wgpluck

Hello all,

I was recently experimenting with csound's wgpluck and wgpluck2
opcodes. Although the ratios in the score are exact, notes in higher
octaves are _very_ sharp. Substituting with pluck or oscil fixes the
problem. Does anyone know why this is, or more importantly, how to
correct it? wgpluck seems pretty useless otherwise...

Thanks,

-Chris