Hello mhsieh,
Thanks for contacting us! I can recreate the problem on my machine, but it seems oddly specific to IE9. I also confirmed that the widget worked as expected with Twentytwelve installed.
At Modern Tribe we work hard to release polished and clean, professional software. However in the open source market place, this is not always the case.
Before submitting a support post, we ask users to deactivate all plugins and change to a theme like Twentytwelve, as a proven way to check for conflicts.
Ideally, they will do this on a local, development, or staging environment. It’s possibly a little tedious, but it is the surest and most efficient way to get to the root of a complicated issue. We know this after years of combined experience troubleshooting technological problems of all shapes and sizes.
If the issue still occurs on a normalized system, there is more than likely a problem with our plugin (a bug).
If the issue goes away on a normalized system, there is more than likely conflict with another plugin or theme that is not ours.
This is an integral part of our troubleshooting process. By reactivating plugins one at a time, checking the problem with each activation, you can immediately find out where the conflict is. Otherwise, it is a difficult (impossible) guessing game.

Can you please deactivate your plugins and theme, to confirm the problem goes away. Please reactivate each piece, until the problem comes back. Please let us know which plugin causes the problem.

– Casey Driscoll