Full_Name: Göran Broström Version: 2.7.1 OS: Ubuntu 8.04 (x86_64) Submission from: (NULL) (85.11.40.53) > plnorm(0, lower.tail = FALSE, log.p = TRUE) returns 1 instead of the correct 0 (zero). The same seems to hold for > plnorm(x, lower.tail = FALSE, log.p = TRUE) for any negative value of x.