I was using Synapse in Ubuntu 13.10 with the hotkey Ctrl+Shift+SPACE. After updating to Ubuntu 14.04 I tried to use the same configuration, but after each reboot the configuration is cleared.
I've checked the file
~/.config/hotkeys/synapse.hotkeys and seems to be OK:
[hotkey:activate] Owner=synapse Signature=<Shift><Control>space
How can I make the hotkey available after rebooting my PC?