Dear all, I'm wondering if cl-gd has been thoroughly tested for thread safety? I've experienced a couple of segfaults here and there, apparently at random, in libgd. Cursory inspection of the code seems to suggest, for instance, that *transfomers* is not safe; the only references to this variable I see are in specials.lisp: (defvar *transformers* nil "Stack of currently active transformer objects.") and in WITH-TRANFORMATION, which does not create a new binding for *transformers*, but rather just pushes a new transformation onto the global *transformers*. Am I reading this right? It seems to me that two different lispworks threads could run in such a way so that 1 thread inadvertently starts running with transformers that another thread establishes then gets swapped out. Comments? Alain Picard -- Please read about why Top Posting is evil at: http://en.wikipedia.org/wiki/Top-posting and http://www.dickalba.demon.co.uk/usenet/guide/faq_topp.html Please read about why HTML in email is evil at: http://www.birdhouse.org/etc/evilmail.html