I am used to hit Ctrl+Alt+PageUp/PageDown to switch workspaces.
Ctrl+Alt+PageUp works fine, but PageDown works only for a short period of time (when I set the shortcut it works. But it forgets this shortcut, because of something)
I can't even replicate it (not sure, when/why it stops working)
Is this a bug/feature?
Does one have some suggestions on howto get it right?