I just reinstalled hildon stuff and I'm testing it right now. But error was not recoverable before and therefore it's hard to say wether it's all good now or not. Only can tell if error shows up again that it's still there. If it doesn't show up for a long while (several days) it's probably solved.

Just remember, there might be entries in syslog file. Completely forgot about that. Will have a look into syslog when errors comes again.