Hi Miller
pd-0.37-2 works fine under linux and has no more denormal-phenomenon.
But the Windows version is badly compiled. You didn't #define __i386__ , so pd.exe don't use the #define of PD_BIGORSMALL in m_pd.h and the denormals still bug the decay of feedback loops.
2 files for testing denormals are attached: test-denormals.pd + fdbkloop.pd
cheers , Thomas.