Since I installed to KDE 4.4.x I lost any "global accelerator" facility, including Alt-Tab, Alt-F1 and Ctrl-F1-F4 which of course renders the whole experience a lot… slower.
Upgrading later to KDE 4.5.5 didn't help either.
I'm running FreeBSD 8.1/amd64 and, as far as I can see, kglobalaccel is working:
% qdbus org.kde.kglobalaccel /component/kwin org.kde.kglobalaccel.Component.isActive true
Any idea what else I could check to debug the issue?