In looking into the SIGILL that AIX 4.3 and AIX 5.2 get from the 1.4.0 klog and afs_dynamic_auth, I see that lwp.c can be compiled to use POSIX threads. Since the SIGILL emanates from returnto(), switching to POSIX threads may sidestep the problem. Is there any reason that klog and afs_dynamic_auth use lwp for thread support and not pthreads? -- Joe Buehler