Version: (using KDE 4.2.2) Installed from: Ubuntu Packages The KDE 4 System Tray expands to the full width of the panel if there is no Task Manager in the panel along with it. The System Tray should be only as wide as it needs to be to show the current icons.
Confirmed in trunk too.
SVN commit 959122 by aseigo: set a max size on the tray when in the panel; the generic fix is to use a spacer, however BUG:190619 M +3 -0 applet.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=959122
*** Bug 190818 has been marked as a duplicate of this bug. ***