Ahhhhhh. you have found the infamous Catala input language. I have had this happen to me after trying to lock my keyboard with the old school 7250 method of holding down alt and cap. However, on the 8800, this changes the input language.
Go into Setting, Options, Lanugage and check to see that English (assuming) is your Language AND Input Language.
let us know.
Who's that peekin' in my window?...POW....nobody now.