OK, somehow when I read your post I didn't realize that you had gotten the stylus keyboard to pop up at all (I thought you were referring to the thumb keyboard) - bad me for not reading more carefully!

Unfortunately that is mostly just replacing the manual behavior of popping the thumb keyboard with popping the stylus keyboard, so I don't think that will help much. Out of curiosity, there is a bug or two about the thumb keyboard causing crashing. Does that happen when you use the stylus keyboard popped in this way? (see the bug list, I don't recall the # offhand.)