kde-4.2

[LPM]

I saw the stretched clock and system tray problem on a client's computer that I worked on recently.  He had upgraded to F10 from F9 and had all the problems listed in this thread plus others.  His Kickoff was on his desktop so it had to be moved to the panel.  His task manager was missing and that allowed the clock and system tray to stretch to fill the panel.  Check that you have the task manager widget on your panel, and it fills the available space.

Good Luck,
Lloyd