Version: (using KDE 4.2.2) OS: Linux Installed from: Unlisted Binary Package So, kmenu isn't the active window just after appearing. This means that after clicking on kmenu button you can't write in the search textbox and clicking outside the kmenu doesn't cause that it will close. Now to close the kmenu you must click on it and then click outside.
Thanks for reporting *** This bug has been marked as a duplicate of bug 188655 ***