Tested 5u13 b01 and 6u4 b02 on RedHat 5, not able to input using java written Wubi IM. Native input method is not deactivated and interferencing with users input.
test program: demo/jfc/Notepad
steps: Please refer to what described in CR5049524.
In RedHat 4, above problem was not observed.
Correction for above description:
The problem is only observed with 5u13. Not reproducible with 6u4.