I got my IP 3GS jailbreaked to fw 5.1.1 and the problem happened. Everytime when I push the "globe" button, the app im using got kickout.

And when i slide it to the Search, it even got restarted.

I installed every language keyboard to check if it just happens only to my Jpanese keyboard, and I can't use any other language keyboards.

Does anyone know how to fix it?