J. Ryan Sobol wrote on 12/23/2005 4:59 PM: > Crafty test program. Coincidentally, my results differ from yours. i was in a similar situation. i was under the impression from page 118 of my well thumbed copy of 'programming ruby' that any shared resource (eg. a file that will be access by more than one thread) should be under the control of a mutex... the program i was working is long running (and been in use for almost a year) and seems to be holding up ok... -- http://home.cogeco.ca/~tsummerfelt1 telnet://ventedspleen.dyndns.org