Comment 4 for bug 1137554

I confirm this in Saucy (13.10).
The input method is all right in 13.04, so it's a big regresion.

I'm not sure which time this is not functioning, just sometimes I can not switch to the next candidate page. And, when an input window is is at the bottom of the screen, sometimes the candidates window show below the screen where I can not seen (e.g., when input in a maximized pidgin chat window.)