Hmm have a Mediator 1200TX seems pretty stable with my Apollo 060. I did have issues with a Mediator PCI Rev1.0 but it was second hand and was faulty :-/
Haven't fired up the A1200T in awhile, it's been sitting in the garage while the Pegasos gets a workout.
Will have to set it up (and see if it still works) and grab my startup-sequence :-)