Howdy, Forgive me if this issue has been more recently addressed in CVS, but a quick scan of the archives didn't turn up any other reports. There appears to be a small typo in src/lib/ioloop-select.c: --- dovecot-1.0.alpha4/src/lib/ioloop-select.c.orig 2005-11-06 22:06:53.000000000 -0800 +++ dovecot-1.0.alpha4/src/lib/ioloop-select.c 2005-11-06 22:07:13.000000000 -0 800 @@ -113,7 +113,7 @@ sizeof(fd_set)); memcpy(&tmp_write_fds, &ioloop->handler_context->write_fds, sizeof(fd_set)); - memcpy(&tmp_except_fds, &ioloop->handler_data->except_fds, + memcpy(&tmp_except_fds, &ioloop->handler_context->except_fds, sizeof(fd_set)); ret = select(ioloop->handler_context->highest_fd + 1, Thanks, Kevin