OK. I'm taking my servers to Fedora Core 2 and 7.5.1 -- looks like I have no choice. Here's my plan: 1) clone the running server on another hard drive. The existing servers all run RH 7.3 and RH 9 right now 2) Upgrade OS using Fedora Core 2 from CD-Rom 3) Run Yum to get the latest non-control-panel upgrades 4) Install Plesk 7.5.1 updater over that. 5) Install 7.5.1 license key 6) shut down old server and re-sync changes in web sites and MySQL databases 7) Swap hard drives 8) Pray for a working system. Has anyone done this? If so, what was your success? The problems you ran into?