https://bugzilla.redhat.com/show_bug.cgi?id=847565
--- Comment #18 from cnsturgeon2000@yahoo.com --- (In reply to comment #16)
If you rename $HOME/.cache/dconf/user , are you able to reproduce your problem with your current account? I'd need to know what was changed in your environment. I guess you won't reproduce your problem if you clean up all the dot files in $HOME.
After the name change, I had to re-config the Chinese input method in the keyboard layout. But still, the problem is there. Initially, everything seems all right. After using the Chinese typing for a while and constantly swithing between Chinese and English, I found the switching part particularly is quite buggy. After Chinese input was disabled and I tried to get it back, nothing happened on screen when I did ctrl-space and I had to played around with something then came back to make it work again.