Version: 3.9 (using KDE 4.3.1) OS: Linux Installed from: Fedora RPMs Option to choose desktop is greyed out, therefor can't choose desktop or put note on all desktops.
Reported to Fedora, asked to report upstream https://bugzilla.redhat.com/show_bug.cgi?id=525012
I've just hit this issue with kdepim-4.4.2 (the workaround is to quit knotes and edit ~/.kde/share/apps/knotes/notes/libkcal-*)
*** This bug has been marked as a duplicate of bug 247612 ***