This is a warning to all Linux users that are currently using the latest Ubuntu OS. Reports claim that some users may damage their Intel network adapters using Ubuntu's latest 2.6.27-rc kernel. Although this is an alpha release and bugs are expected, it might even damage your hardware to a state where you can't repair your NIC. In bug #263555 posted on the bugs.launchpad.net experts say: "In some circumstances it appears possible for the 2.6.27-rc kernels to corrupt the NVRAM used by some Intel network parts to store data such as MAC addresses. This is limited to the new e1000e driver, and reports have only appeared from users of "82566 and 82567 based LAN parts (ich8 and ich9)". The reports seem to be isolated to laptops, but it is not clear if this is because desktop/server parts are not vulnerable, or if use cases simply increase the chances of laptop users being hit. Once this corruption has occurred, recovery may be possible via a BIOS update, but may well require replacement of the hardware. Use of Intel's IABUTIL.EXE is strongly discouraged, as it will worsen the problem to the point where the network part will no longer appear on the PCI bus."