System Tray Creation Too Late?

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http://forums.opensuse.org – Am running 11.2/KDE on dual Athlon 32 bit. On startup the hplip device manager tries to place its icon in the system tray, but this fails with the message "No system tray detected on this system". The system tray is not yet present, but appears moments later. If I wait until the system tray appears and then enter the console command "hp-toolbox", the app successfully inserts itself into the tray. Am aware of a similar problem posted by kannte on 13 Dec 2009, "System tray problems", and have tried the suggested solution of removing the .hplip folder. Didn't help. (Distributions)