I have a LM 6.1 (waiting on KDE 2.0 before any more upgrades), and everything works OK that I really need. Except: My mouse (Boring Serial Mouse) works great, except when ANY long-running IO occurs with any Hard Drive or CD-device , even if it is not intensive (ie: Burning a CD). I have tried running and not running IRQtune, but I get the same results. The mouse jumps all over the screen even when not being moved. It is not just a delayed result, it is a totally incorrect movement (or rather jump). Any thoughts on even where to investigate? Eric Aksomitis