Sublime Text 2 Windows version seems not to handle IME(Input method editor) message on Windows. If the application doesn't handle these windows messages, whenever user input any characters like Korean, Japanese and Chinese, small square box appears left top corner of the screen and it's very eyesore and uncomfortable. Actually handling these messages is not difficult. You can accomplish this with just < 100 lines code. I really hope that Sublime handling these soon.
Customer support service by UserEcho