Not easily reproducible, but happens relatively often. (doesn't matter to much
what actual variables are)

1) have this line of code

  data.setGMISeparatorAfter(someCheckbox1.isSelected());

*Fastly* write/do the following:

1) write "data.setGMISeparatorBefore(someChec" (without quotes)
2) press Ctrl+Space, choose "someCheckbox2"
3) write ".is"
4) press Alt+K (isSelected is filled up)
5) write "()"

During pressing ')' in step 5, following line is the result:

  data.setGMISeparatorBefore(menuSeparatorBefore()

instead of 

data.setGMISeparatorBefore(menuSeparatorBefore.isSelected()

Very annoying.