Full_Name: Morten Welinder Version: 2 OS: Solaris(sparc) Submission from: (NULL) (65.213.85.208) (gdb) p pnorm(-100000.1, 0.0, 1.0, 0, 1) $42 = NaN(0xfffffffffffff) Expected: -0 (gdb) p pnorm(-100000.0, 0.0, 1.0, 0, 1) $43 = -0 Good. (I know this is not a typical usage.)