Okay i keep getting this message: "[WARNING] [Minecraft] Can't keep up! Did the system time change, or is the server overloaded?" on the Console, each time it appears the game lags for 1-2 seconds, eventually it will just crash, it's only near my base so I'm assuming it has something to do with an item maybe? There are also messages about there being no renderer for id 2, 3 & 5. Can anyone help?
Console log: http://pastebin.com/Rs2gjzmM
Console log: http://pastebin.com/Rs2gjzmM