Long story short... I turned my G4 DP1ghz in for a bad firewire port... four weeks, two different repair shops, three logic boards, three processors, new RAM, power supply and one front panel later it's back. Seems to work, but I'm getting trails when I move my mouse or drag windows. Feels like the redraw is slow. I checked and saw that my graphics card is unchanged (or at least the model's the same). What might be causing this? Any thoughts?