bug in 8.1

I am using english version windows XP with chinese input. Before i upgrade
to v8.1, when i typed chinese in msn, there is a popup window to show which
character was being inputted. After upgrade to v8.1, this popup window
cannot be showed. After test, i found that the popup window is hidden or
overlap by other windows. When you tried to switch to other windows, you
will find that the windows was actually popup but didn't show on top. It's
in background.

Anyone has the same problem?