ibus tray icon missing on LUBUNTU linux 13.04

Install the following packages libappindicator1 and python-appindicator:

sudo apt-get install libappindicator1 python-appindicator python-gconf python-glade2 python-pexpect

will fix the problem.

See also

• IBUS does not open when selected from menu or applications from within filemanager (PCmanfm)