I am about to upgrade a FC4 box to FC6 and am greatly concerned about the unstable state of both 2.6.19 kernel releases so far. A second machine running the latest kernel-2.6.19-1.2911.fc6 kernel exhibits strange memory problems and on a third machine the same kernel exhibited major slowdowns after mounting and unmounting external usb drives. I was going to use the same kernel-2.6.18-1.2869.fc6 release that seems stable on those FC6 machines when I did the new upgrade. However I don't see the kernel-2.6.18-1.2869.fc6 release in the updates directory now for FC6. What is that about? Why would Fedora remove the last stable kernel and leave us with either the original FC6 kernel or 2.6.19? Thanks in advance for any clarifications. Jack