Why all my wallet have this error?

Is everything ok?
Mining and transactions seems to work well, but just wondering that...

Am I only with that?
I check blocks with block explorer, my wallet and tix.coinmine.pl pool and all count same blocks, so everything seems to be ok, but have you guys this message in your wallet... any one?
I have that as well. The dev just needs to update the checkpoint. Everything is fine.