On Fri, Jul 13, 2007, John Yatsko, Jr. wrote: > Red Hat Linux release 6.0 (Hedwig) > Kernel 2.2.5-15 on an i586 I don't think anyone does Squid development and regression testing on Linux 2.2.x. Just find the commSetTcpNoDelay() function and do this: #ifdef TCP_NODELAY static void commSetTcpNoDelay(int fd) { return; } #endif I don't know why its finding the socket option but then failing to do it. Its harmless. Adrain