I've noticed with the calendars this time (at least in PC and VC) there isn't that annoying error message popping up anymore. I think it was showing up to prevent an error that occurred when people would click and not get a reward. Well anyway I remember a dev telling me they couldn't do anything about it but apparently now they were able to. Thanks KANO if you were responsible.
If i remember correctly i think they said they had to be synced completely with the platform the game was on and on their end everything was always fine. It was the platforms end that was dragging behind by a few seconds or so causing those pop up boxes. So maybe facebook finally was able to speed itself up a little bit more and solve the issue for kano so we don't have to complain no more.
I noticed it as well and I want to say thank you, thank you, thank you!!! So nice not to have the problem!