KDEINIT cannot launch anything! (...after some inactivity)
If I leave my computer sitting awhile (I'm guessing 30 minutes, but haven't timed it) and then come back to it, KDE has problems launching programs from either the panel buttons or my keyboard's multimedia keys. In some cases, I'll get the bouncing cursor and the taskbar will show the name of the program that's trying to launch, but it will never actually launch. In other cases, I get a message box saying "KDEINIT could not launch [whatever program]." The behavior seems dependent on the program that's trying to start--Iceweasel (Firefox) exhibits the first behavior, while Konqueror exhibits the second.
I suspect it's also affecting my monitor's power management, since sometimes it doesn't go to suspend or power off, even though the Control Center has times set for both.
The only remedy I've come across is to log out of and back into KDE, which I'd prefer not to have to do. I've searched a couple of times now for hints on why KDE might do this, but only come up with things that affect one application at a time (and usually involve desktop shortcuts requiring root access).
FWIW, I'm running Debian Testing, with KDE 3.5.5.