is your SNTP set to display a message box or log to a file?
I haven't checked the code yet, but if it's really not possible by now, I'm gonna add it at some point because I've always planed to add automatic syncing to T-Clock (I'm using a full blown NTP client that runs once after boot, delayed by 30 seconds to allow the system to startup... but I'd prefer some automatic way that does this on "idle")