So I run a fairly popular server that's been up for a few months now, and we have just gotten an interesting problem that I can't seem to solve! Out of nowhere, a lot of my playerbase has been getting an error upon trying to login to the server. Here is what I see in console: [INFO] PlayerName [IP Address] logged in with entity id 12345 at ([world] 1564.6176761071772, 78.0, 5819.562635548683) [WARNING] PlayerName Moved too quickly! Now, in the game, it shows them as logging in and then logging right offline. The message above is all it shows, doesn't show a "disconnecting" message or anything in the console. It also doesn't happen to everyone, it's maybe a dozen or so different players so far. Some of them get the error constantly, and can't login, some can try over and over and eventually they'll be able to get in. The only solution I have come up with, is deleting the users .dat file. It then logs them in at spawn, and they can log right in. So is there perhaps some error where they are logging out that's causing them to get this error? I havn't done any plugin updates or anything recently, and it just started happening randomly a day ago. Here's our system specs: - Intel Xeon E3-1230 3.2 Ghz - 16Gb RAM - 60Gb SSD and 1 TB HDD (Servers on the SSD) - Runs on CentOs 5 64bit Plugin List: AlphaChest Quicksign SignRank AutoDisc GroupManager WorldEdit FlatlandsBuilder SpleefUltimate Vault Stargate Multiverse-Core WorldGuard AutoMessage MineBackup SimplyVanish CasinoSlots EndReset SignThatBlock DisguiseCraft LotteryPlus BASpleef CoreProtect MobSpawnControl TimeLock BKCommonLib Votifier MobArena mcMMO FoundDiamonds Essentials hatMe MagicCarpet ATMsigns MobDisguisePVPControl EssentialsSpawn Multiverse-Portals Multiverse-Inventories Multiverse-NetherPortals SignShop LWC dynmap EssentialsChat WorldBorder AlphaChest QuickSign WhitelistCommand Also, our current world is QUITE large. It's a 10k by 10k and sitting around 2.2Gb compressed. So if it's something I need to fix with the world file, please give me some solutions, as I am stuck as how to fix this. Any help would be fantastic! Thanks!