Doc : A somewhat better introduction. The FUNCTION section was moved before CONSTANTS and HISTORY since it's more important. And 'assignation' is really 'assignment', says Ricardo. :)
Fix : The op_info features are now thread safe.
Fix : Segfaults that occured when trying to get the op name during global destruction.
Fix : Segfaults and wrong "Unknown error" exceptions that happened when dieing in require caused a free callback to fire. Thanks Florian Ragwitz for reporting.