I am running a custom kernel built from the kernel.org 2.4.26 source. The Redhat Network Alert Notification Tool gives me the following warning... "You are running kernel-2.4.26.rac, but it is not installed in RPM format. It is highly recommended that you run the official Red Hat Linux kernels. By running a custom kernel, you will miss out on any security fixes and functionality enhancements provided by Red Hat Linux, and your configuration is unsupported. " How do I find out what these security fixes etc. are? Are these fixes not fed back into the main kernel branch? Just curious - my kernel seems fine. Richard.