General Keyboard Problems
Problem: The keyboard doesn’t work at the LILO prompt or after booting from a Windows installation disk.
Solution: This is a bug in Apple’s firmware. There is nothing rEFIt could do about this.
So far the only reports are from MacBook Pro Core 2 Duo models, but other Core 2 Duo models may be affected as well. Usually the keyboard works on some boots, but not every time. So the workaround is to reboot and try again.