more 1.1.6pre2 deadkeys

[Christopher Jones]

Upgraded yesterday to the new version. Looks nice! Although, I am
starting to miss the lyxrc. It was so elegant compared to shuffling through
menus...

Anyway, I have my keymap bound american, and when I go to type the :u sequence
for an umlaut the cursor jumps ahead, just like it is supposed to, but then the
u which I follow with just sits there, and gets no umlaut. 

If I follow the : with a space, which ought to show it, I get nothing. What
kind of a problem is this? I can't find anything substantially different from
this and my old setup... I'm sure its just a stupid configuration option that I
missed. Any hints?