Some more info about affected PCI IDs:
We got 2 reports about (this and bug #428322)
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x294c "82566DC-2 Gigabit Network Connection"
And one report with (bug #428180)
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x104b "82566DC Gigabit Network Connection"
And I got one report about a working installation of Beta1 with e1000e driver
Some more info about affected PCI IDs:
We got 2 reports about (this and bug #428322)
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x294c "82566DC-2 Gigabit Network Connection"
And one report with (bug #428180)
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x104b "82566DC Gigabit Network Connection"
And I got one report about a working installation of Beta1 with e1000e driver
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x109a "82573L Gigabit Ethernet Controller"
maybe that helps.
John I did add you to the duplicate bugs as well.