Hi everyone. I'm using Windows 7 x64 on a Santa Rosa MBP which has an Atheros AR5008X wireless network card. It seems that when the computer has been on for a while, the wireless driver fiddles with the power management mechanism somehow and breaks sleep mode. When the computer enters sleep mode, it instantaneously wakes up again. No problems exist if the card is disabled and enabled just before entering sleep mode. I'm using the driver from Windows Update, dated 8th of July 2009. I was wondering if anyone else is experiencing this problem and has found a viable workaround?