this bug appears to happen with those ACII characters
you can recreate it by doing: alt+ (numpad x) as far as I know, I think these are unsigned shorts (16bit) so don't put in a number over 65535 or overflows yadayadayada computer stuff
etc Alt+0256 to do: ö.
ive tried with alt+246, erase it and blu screen with that UTF-8 bug(also to do a ù do alt+151, handy chart here http://www.irongeek.com/alt-numpad-ascii-key-combos-and-chart.html )