The bug about the whole tray being corrupted was reported here: bug 298475.
The fix for the the icon background corruption has been fixed with the release of KDE 4.2 beta 1 to Kubuntu Jaunty and the Kubuntu-Experimental Personal Package Archive for Intrepid.
The bug about the whole tray being corrupted was reported here: bug 298475. Experimental Personal Package Archive for Intrepid.
The fix for the the icon background corruption has been fixed with the release of KDE 4.2 beta 1 to Kubuntu Jaunty and the Kubuntu-