I'm testing KDE 4.2.4 in Slackware (current) and a I notice if I click a lot between device notifier,application launcher (the new), system operations dialog (the i in the task bar), show me desktop and the workplaces. All thing breaks lose and the (i) on taskbar stays on but i can not see the file operations dialog anymore. The device notifier list and the application launcher disappears also.
Is this a bug or I'm getting too hard on it?

The brainstorm forum is only for ideas regarding new features, it is not the place for bug reports or help requests. I have moved the thread for you, but in the future please ask questions in the appropriate forum.