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1.4 was a server version of Java Edition Classic released on June 13, 2009,[1] at 13:30 UTC.[2]




  • The server now checks all incoming strings, verifies that they are all within reasonable limits, and kicks the sender if they are not.[1]
  • Server output is now logged in file server.log.[4]


  • Fixed an exploit where people could crash everyone connected to a server by sending a fake text message.[1]
    • The client would gladly attempt to render weird unicode characters, but would crash when trying to look up entry ten thousand in a 256 entry array.[1]


Server 1.4 was reuploaded at 14:22 UTC[5] (52 minutes after release) to fix a bug where the player could click outside of the map.[6][7]


  • June 13 IRC logs: IRC logs on Archive.org; #minecraft.20090613.log. June 13, 2009 (UTC−5).
  • June 14 IRC logs: IRC logs on Archive.org; #minecraft.20090614.log. June 14, 2009 (UTC−5).
  1. a b c d "New server update, 1.4" – Notch, June 13, 2009, Tumblr
  2. June 13 IRC logs: "A8:30:10 <Notch> there's a new minecraft-server.zip up" (13:30:10UTC)
  3. June 14 IRC logs: "A5:57:41 <Notch> there is a teleport command in the new server. =)", "A5:57:48 <Notch> /teleport <name>" (10:57 UTC)
  4. June 13 IRC logs: "P6:38:36 <smn> Notch, is there any way to log server output?", "P6:38:47 <Notch> it should do so already since the latest server update!", "P6:38:49 <Notch> server.log" (23:38 UTC)
  5. June 13 IRC logs: "A9:22:34 <Notch> robink93: new server.zip up" (14:22:34 UTC)
  6. "If you get the "clicked outside the map" error," – Notch, June 13, 2009, Tumblr
  7. June 13 IRC logs: "A9:15:36 <robink93> Cheat detected: clicked outside map." [...] "A9:15:51 <Notch> and it wasn't, robink93?", "A9:15:54 <robink93> yes it was", "A9:16:02 <robink93> jump, place block under, repeat", "A9:16:09 <Notch> ok, I can make it not kick on that, I guess. :D" (14:15 to 14:16 UTC)