Back in November a question(and response) were posted regarding thread safety in the 1.0.1 branch of OpenSSL: http://www.mail-archive.com/openssl-users@openssl.org/msg69322.html In the response to the questions, the user states he removed the thread ID callback function and the call to CRYPTO_set_id_callback(). However, there was nothing as far as follow up to verify this was correct. Is there information out there(perhaps another thread on this list I am unable to find) someone could link me to that discusses the differences in ensuring thread safety between 0.9.8 and 1.0.1? Thanks.