[Uim] Problem using new schema

[David Oftedal]

Hi!

I've played around with the thought of making a romaja schema for 
Korean, and although I can only read two Jamo, "l" and "ng", I've 
started working on it.

I've encountered a few problems here and there, but there's one problem 
that I can't seem to solve.

When typing in a hangeul character with the new schema, what I've 
already typed in changes once I continue typing. A character can 
disappear or turn into something else, apparently. I've tried spelling 
the word "hangeul" in the examples on my website. The reason I'm using 
an extra n is to differentiate between n g and ng:

http://home.no.net/david/romaja/

I know there aren't any words that begin with "hanng", because I 
searched for it, so there's obviously some error in the schema or 
elsewhere that's causing the characters to change. Either that, or 
there's some mighty Hangeul secret that I'm not aware of.

Unfortunately, I can't terminate the character after typing "hann", 
because pressing something like return or an arrow key causes the 
character to disappear entirely. This is not a bug, because it happens 
in the pinyin map too, it's just rather inconvenient.

Could anyone possibly guess what's wrong with the schema? Other 
suggestions for improvements are welcome as well, of course. A few of 
the changes I made were pure guesses, so there's probably a lot that 
could be improved.

-David