If iBus is enabled, any key pressed will doubled in any edit box i.e. TEdit or TMaskEdit.
for example if I press "SYS", the edit box will display "SSYYSS".
I have to turn off the iBus to prevent double key pressed.
iBus is very useful for input UTF8 Character ( Asia Character ). I cannot turn-on and turn-off iBus very often.
It seems that only Lazarus's application has problem with iBus.
Lazarus - 0.9.30.4, gtk2
Ubuntu 11.10