The activity is starting while inputting it in Japanese

Binary package hint: hamster-applet

I use Japanese Input Method to input activities in Japanese.

Broadly speaking, we use it as following

1) Enter into Japanese Input mode to press Ctrl+Space.
2) Input a Japanese word using alphabetical characters.
3) Press Space to start the conversion into the Japanese word using Japanese characters.
4) Press Space to change the candidate of the conversion if need.
5) Press Enter to decide the selection of the candidate.

Pressing Enter causes starting the activity in Ubuntu 10.10. So the activity starts after inputting the first word and before inputting the second word unfortunately.

I guess that the "activate" signal of GtkEntry should be used for starting the activity. The sample program and results is attached. It shows how signals and events send while converting into Japanese.