sudo apt-get install ibus-qt4
By default, I cannot input Chinese in Linux version of Skype. This issue doesn't get solved when Karmic Koala decided to introduce a new input framework, ibus, to replace scim.
To solve this problem, add these 3 lines into your .bashrc file and reboot:
export GTK_IM_MODULE=ibus export XMODIFIERS=@im=ibus export QT_IM_MODULE=ibus
If you prefer scim, maybe these lines will help (not tested):
export XMODIFIERS=@im=SCIM export GTK_IM_MODULE=scim export QT_IM_MODULE=scim
Skype is better now under Ubuntu.