Make of otp_src_R9B-1 fails on RedHat 9.0. The problem is described by Erik Pearson here: http://www.erlang.org/ml-archive/erlang-questions/200210/msg00022.html If you could toss in a 'use bytes;' at the top of erts/emulator/utils/make_preload this will prevent others from experiencing this problem. -Karl Robillard