Description of problem:
After setting "Press [,][.] to page down up" option active in ibus by default, pressing [,] or [.] keyboard don't page down or page up the candidate characters.

Version-Release number of selected component (if applicable):
ibus-1.2.0.20090617-1.fc12 - i586

How reproducible:
Always

Steps to Reproduce:
1.Make sure you have Chinese-PinYin in the input method.
2.In gedit, press Control+Space to launch Chinese-PinYin input method.
3.In the language panel, click "Configure PinYin" button, then select "General" tab, "Press [,] [.] to page down up" option is selected by default.
4.Input "hong" and press [.] keyboard.
5.Press [,] keyboard.
  
Actual results:
After pressing [.] or [,] keyboard, no page down and page up in the candidate window. 

Expected results:
After pressing [.] keyboard, the second page of candidate characters display.
After pressing [,] keyboard, the first page of candidate characters display.

Additional info: