Since kernel kernel-2.6.27.3-34.fc10.x86_64, r8169 driver fails to read the mac address when loaded. This stops network from working. Manually setting it fails. kernel-2.6.27.3-30.fc10.x86_64 works without problems. Loading r8169 with debug=16 reports: r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded r8169 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 r8169 0000:03:00.0: setting latency timer to 64 r8169 0000:03:00.0: no MSI. Back to INTx. eth0: RTL8168c/8111c at 0xffffc2000066e000, 00:00:00:00:00:00, XID 3c2000c0 IRQ 17
Seeing the same problem here.
This is fixed for me in 2.6.27.3-44, as the offending patch was disabled.
*** This bug has been marked as a duplicate of bug 468360 ***