Old troubled setup:
ASUSTeK P5S800-VM SiS661FX/SiS964  Intel Celeron D 336 Prescott LGA775  Transcend/A-Data DDR400 512+512 MB  Realtek ALC655  Realtek RTL8139  Maxtor 80 GB & 250 GB 7200 RpM Ultra DMA 133  DVDRW LG HL-DT-ST GSA H10N  PS/2 mouse & keyboard
OS X 10.5.5 (Kalyway 10.5.2 updated) & 10.5.6 (XxX)  9.5.0 Voodoo XNU Release 1.0 Rev. A