How to fix input any text in Japanese flash page Chrome

OS: Ubuntu 9.10 (Karmic Koala), 32bit
Window manager: GNOME default
Chrome: 4.0.266.0 (Official Build 33992)
Flash plugin: 10,1,51,66 (10.1 beta 2, you can check the version by visiting http://www.adobe.com/software/flash/about/)
IBus: Karmic's default. ibus 1.2.0.20090927-2ubuntu2 and ibus-anthy 1.2.0.20090813-2.

Steps to reproduce:
0. Make sure your IM framework (IBus, SCIM, uim, etc.) is properly configured.
1. Download the latest flash plugin, flashplayer10_1_p2_linux_121709.tar.gz.
2. Extract the tar ball and run the installation script as a non-root user to install the plugin to ~/.mozilla/.
3. Start Chromium, then visit http://www.adobe.com/software/flash/about/ to make sure you're using the latest plugin.
4. Visit http://www.ustream.tv/channel/CBS-News (for example)
5. Click the "Chat" link on the right side of the video window.
6. Click the text area inside the chat application, then press an IME hotkey.

Can someone check if the latest plugin works fine with other IM frameworks and/or for other languages?