Version: (using KDE 4.2.0) Installed from: Ubuntu Packages Menu K -> Leave, select one of leaving options. Ex.: restart. The dialog appears, but only "restart" option is showed. I can undo or confirm. I can't change the leave option in this dialog, even though the "arrow" that should open the list-menu appears. Naturally, if I press on this arrow, I accept the first choice and the shutdown starts. P.S.: the dialog seems to be compressed, with the world image deformed. Sorry but I can't stamp the screen when a dialog is showed (another bug?)
*** This bug has been marked as a duplicate of bug 177139 ***