Hello, we had a problem of block reappearing when broken. We upgraded to craftbukkit 450, the problem is gone but another problem is here now: when a player logout from the game, the server freeze, the chat is laggy, the blocks reappear et players stop moving. This last 2-4 seconds and on a big server (+-80-100 players) it it A LOT of logon/logout every minutes... so its very annoying :/ There is no lag when a player join, only on logout !! Our server is an AMD 6core @ 3.2ghz, 16gb DDR3 .... Any idea or a bukkit build with no lag?