Comment 1 for bug 385506

By 'does not run', do you mean you click on the UbuntuOne menu item and nothing shows up? If so, please run:

$ ps aux | grep ubuntuone

if there is a process called ubuntuone-client-applet, the applet is running, but you probably don't have a system tray in your KDE panel/dock. The ubuntuone-client-applet is indeed a system tray icon, a "protocol" that is supported by both KDE and GNOME, so if you have a system tray, it should show up there when you run it.

If this is not the case, please open a terminal and run:

$ updateone-client-applet

and paste to this bug all the output you see