Sometimes, input method can't work on gedit. (Linux Mint 12)

[sutara_lumpur]

I am Japanese.
I use input method the "ibus-mozc".
And I use text editor the "gedit".
Sometimes, input method can't work on gedit.
I found the conditions that the trouble certainly occur, so I report here.

1. Start gedit.
2. Push "Super + D", and switch to desktop.
3. Start PCManFM (file manager).
4. Push "Alt + Tab", and back to gedit.
5. Then, probably you can't use input method.

It doesn't occur with only file manager, but all new windows.
And not only iBus, but SCIM.
The problem occurs also except this condition.

I also found solution.

1. Push "Alt + Tab", and switch the active window from gedit to any application.
2. Click to focus on it.
3. Push "Alt + Tab", and back to gedit.
4. Then, the problem is solved.


Please give me any suggestions.

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OS: Linux Mint 12 LXDE
PC: DELL Inspiron Mini 10v
(Netbook, 1.6GHz CPU, 1GB RAM)
gedit: version 3.2.3
iBus: version 1.3.99.20110818