I want to report a bug but don't know in which package or how to do it in this case.
During installation of 12.04 (from USB-stick) I was using my wireless keyboard "ace ac-c5". (it's a little dongle blutooth/RF + the keyboard).
Some keys were making the wrong output, like "m" was outputting "0" and so on.
After installation the keyboard worked correct again but then of course my password I set during installation was not correct since it was set when the keyboard sent wrong chars.
I have tested more times and know that it was not a one time error but that when booting from the USB-stock the keybord is not correct but after install it is.