I have to start more posts with "this is a wild guess but..." it seems to work for me. I did suspected your had a QWERTY keyboard, but I come from French Canada and our key mapping is slightly different than the US standard to allow for french accents. Same goes for Mexico, etc. French keyboards have a very different mapping.
Yes, this is a problem. MEBx like the BIOS are simply not aware of how the keys should be mapped. There is not BIOS option for entering the keyboard mapping to use. During Windows setup, it's one of the first thing that is setup, but americans often don't notice this.
To my knowledge, there is no plan to fix it. In enterprise deployments, it's not an issue since you don't use MEBx to setup anything (in most cases).
Ylian (
Intel AMT Blog)