I have the problem described here: i.e. shortcut keys (Shift Ctrl up) suddenly not working.
The solution is, apparently: "you should manually fix the value of the DConf key /apps/guake/keybindings/global/show_hide"
but i cannot find this in gconf-editor as they suggest. (I installed guake using ppa:linuxuprising/guake). Thus i cannot fix it manually
Update: I changed the shortcut key to something arbitrary, i.e. from Ctrl shift up to alt pgup and then the old shortcut key started working, i.e. Ctrl+shift+up now works (even though the preferences in GUI indicate alt pgup). I did the same for Ctrl+shift+down (changed to alt left-arrow) and now it works again. I then changed it back and repeated to confirm the behaviors.
