See twitter for general details.

As for the time since your last share, looks like crackfoo changed how long the site waits to show found blocks on your "last 50 earnings" table. If you look at the pool you're mining, you'll notice that fresh blocks sit in the "new" state for much longer than they used to, before becoming "immature" (and then showing up on your wallet page). Perhaps to better account for orphaned blocks. Dunno.