Our problem seams to appear when we are using all three: LWP, HTTPS, and threads. I tried using Net::SSLeay that you use - still segmentation fault. Note that we run under "perl -d" we don't get the segmentation fault but rather the join never returns. In a larger case which also gives a segmentation fault, we get "Bad signature in parser state object at 88de850 during global destruction." when we try to join the completed thread. We are using perl v5.8.0 built for i386-linux-thread-multi I thank you for your help so far. Ray Smith @ raysmith@alum.mit.edu