Yes, the two things are a bit different, the bug I reported has a broader scope. Maybe a more specific bug would be useful and easier to get some fix implemented.
My request came from the more general concept is that there should always be an utterly powerful application that consistently handles control of keyboard and mouse, which I'l explain here since this is news about a DE:
1) Ctrl+Alt+Del (or another combination) should always be intercepted by a part of the DE and instantly acted upon (because maybe you want to kill that application that has taken control of your keyboard and now is thrashing the HDD and never replying, thus blocking everything). Alt+Tab should have almost as much power. Needles to say, this doesn't happen in KDE at least.
2) Dialogues requiring passwords should uniquely capture the focus at all times. I've seen the GTK implementation of these dialogues (PolicyKit I believe is called this authorization framework) telling me that it could not get total control over the keyboard focus. The KDE counterpart just crashed in the same situation. If not for the exaggerated intrusiveness, my experience with Windows Vista would have been delightful (those always got total focus, with messages I understood and even the transition animation worked). Compare this to: https://bugs.kde.org/show_bug.cgi?id=271147, which is just as bad a joke as the "lost+found" thing in the SystemSettings.
3) The DE should know where keyboard shortcuts go. If they go through a KDE3 daemon to Amarok through whatever library, then that daemon should be listed.
In my experience Linux looses badly when compared to Windows when managing misbehaving GUI applications, or taking control over input. In Windows I have Ctrl+Alt+Del for whatever full-screen and custom resolution app. missbehaves; in Linux I pray that it doesn't misbehave because it can: leave Xorg,KWin,Plasma panels in some sorts of corrupted states, because there's no Ctrl+Alt+Del instantly respected (but Ctrl+Alt+F1 seems to generally manager to bring me to a console). Fortunately, over the years at least Xorg and video drivers got their bugs fixed (I think KMS also helps), so at least Xorg doesn't crash that easily.