Comment 5 for bug 481656

Got exactly the same problem, with FreeMind as well as its fork FreePlane (Java programs).
This problem also happens when using a Qt program, namely Qt Creator in my case, though the problem generally comes after I type "Ctrl+F" (find and replace). This also can also happen in temporary windows Qt Creator creates.
Example : I hit "New class", then a dialog box appears, the keyboard does not work anymore, then I close this dialog box, reopen it and then it works.

I have had these problems since I configured IBus for being able to type in Japanese, but as Piranha says, it does not seem to have anything to do with using various input methods, as input methods are turned OFF when the bug appears.

Hope this will be corrected before next version of Ubuntu...