I've installed iBus and ibus-mozc, and an input method engine of Japanese from the repository, and attempted to enable mozc from Preference > "Input Method" tab > "Select Input Method" combo box. However, there is no choice to select, so I couldn't enable mozc. I also tried ibus-anthy, another legacy Japanese input method, but the situation was the same and I couldn't use anthy. Same problem is also occuring in openSUSE 12.1, so I don't think this is distribution-specific problem. In addition, this trouble also happened when I installed ibus-pynin, so this is not Japanese-specific. Any idea to find the cause of this trouble?