Comment 83 for bug 663776

As othres says, it seems that current unity does not render pre-edit text.

I create patch to re-render text on pre-edit text changed.
https://code.launchpad.net/~cosmos-door/unity/fix-preedit-663776

This patch is working correctly in my environment (Japanese with ibus-anthy).
But I didn't test other environment (Chinese/Korean, and ibus-pinyin/ibus-skk...).

If you can build unity from source, please try it.