Hello. It looks like I have encountered a bug in simple libpth based application. It was compiled statically in no-debug mode with libpth-1.4.0 from ftp.gnu.org and it main task was to resend data it read from FD#0 to FD#1 while buffering it. If you'll need any details then I will certainly help you. -- Best regards, Aleksey mailto:[EMAIL PROTECTED]