@peppi, never installed the Time Machine update with Zephyroth's release after following up with what other's have said. My SMBIOS is the latest from March 28. I replaced both kernel and System.kext as well. Below are my specs (and yes, it is a uniprocessor)-

Operating System: Windows Vista Ultimate (x64-bit) Retail, & Mac OSX Leopard 10.5.2 Zephyroth Rev.2 (Evaluation purposes only)
Central Processing Unit - AMD Athlon 64 Processor 3500+ Venice
Mobo - Gigabyte Technology K8NXP-SLI---Nforce 4 SLI Chipset
RAM - 3GB DDR 400, 2xCorsair XMS (2GB), 2xCrucial Ballistix (1024MB)
HD - 1 SATA2, 320GB, Western Digital, 16MB Cache
ODD - 1 NU IDE DVD-RW, 16x
Video Card - Nvidia Geforce 6600GT 128MB PCI Express (2) / SLI-mode
Audio: AC'97
LAN: Realtek Ethernet Card
Keyboard/Mouse: Logitech LX700 Cordless Desktop
Monitor: Samsung SyncMaster 216BW Series (one of the best out there on the market today)

Printer: Canon MP830, works flawlessly!

Perfect Install, =)