Focused fileupload buttom on Enter press bug in IE9

Problem is incorporated with ZK-2471 bug.
Work around don't help for Enter press on focused button.
http://zkfiddle.org/sample/jjkaq4/1-upload-problem-ie10 - only textbox added.

To reproduce bug run link sample in IE9:
1. Click on textbox and press TAB button to get focus on button.
2. Press Enter key on your keyboard.
In ZK 7.0.3. file upload window is shown, but same problem as before.
In ZK 7.0.4. file upload window is NOT shown at all.

Please help with work around if possible for 7.0.3.