I've noticed today that the current debian testing driver for the atl2 ethernet card (version 2.0.3-3), leaves the card in a bad state that windows cannot recognize. When rebooting from debian to Windows it says that ethernet cable is not connected. However, if I disconnect the power supply of the computer, so ethernet card fully powers off, it works again. So, rebooting from debian to debian is fine, but rebooting from debian to windows chrases.
Dunno where I should fill the bug, so I've send this email to the list. Please, keep me tracked of this issue.