Check your pools and compare it with block explorer, some pools has fork...
I think block explorer is still on fork.
Edit: Or maybe I'm wrong. But my updated client has less blocks than the explorer.
If block explorer in fork, then devs anytime can start solo mining with minimal dif, and after say that all pools and block explorer was on fork... Block explorer must be real mining indicators. And block explorer shows correct all mining block after update until some time, while some pool don't start fork... if devs will say what block explorer on fork then CAT can be buried...