thread safety for binding issues

Hi, how much thread-safe is PHP on linux when compiled with --enable-experimental-zts ? When I a set up a callback handler for a 3rd library which uses threads and in this (C) callback I call call_user_function() (to provide custom callbacks) -> bang , I get a segfault. Should it work and I'm doing something stupid or is this some limitation? Hints? - Markus -- Please always Cc to me when replying to me on the lists. GnuPG Key: http://guru.josefine.at/~mfischer/C2272BD0.asc "Mind if I MFH ?" "What QA did you do on it?" "the usual?" "ah... none :)"