I'm getting all of these problems on multiplayer. Here's my console:
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] Setting user: sworddude
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] (Session ID is token:0d3971181f024525886d652f614970bc:a5362e3ea1634ae88a37b9c714fd6467)
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] LWJGL Version: 2.9.0
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] Reloading ResourceManager: Default
Client>
Client> Starting up SoundSystem...
Client> Initializing LWJGL OpenAL
Client> (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
Client> OpenAL initialized.
Client>
Client> 2013-07-03 15:13:03 [CLIENT] [INFO] Connecting to 208.100.19.148, 25565
Client> Setting up custom skins
Client> 2013-07-03 15:13:04 [CLIENT] [INFO] [CHAT] sworddude joined the game.
Client> Setting up custom skins
Client> Setting up custom skins
Client> Setting up custom skins
Client> Setting up custom skins
Client> java.net.SocketException: Connection reset
Client> at java.net.SocketInputStream.read(Unknown Source)
Client> at java.net.SocketInputStream.read(Unknown Source)
Client> at java.io.FilterInputStream.read(Unknown Source)
Client> at org.bouncycastle.crypto.io.CipherInputStream.nextChunk(Unknown Source)
Client> at org.bouncycastle.crypto.io.CipherInputStream.read(Unknown Source)
Client> at java.io.DataInputStream.readChar(Unknown Source)
Client> at ex.a(SourceFile:257)
Client> at gf.a(SourceFile:40)
Client> at ex.a(SourceFile:206)
Client> at cn.i(SourceFile:248)
Client> at cn.c(SourceFile:16)
Client> at co.run(SourceFile:93)
Client> 2013-07-03 15:13:27 [CLIENT] [INFO] Stopping!
Client>
Client> SoundSystem shutting down...
Client> Author: Paul Lamb, www.paulscode.com
Client>
Game ended with no troubles detected (exit code 0)
Deleting C:\Users\Andrew\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-702379384588
Couldn't delete C:\Users\Andrew\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-702379384588 - scheduling for deletion upon exit
Please post your whole Development Console log.
The error you are receiving may be caused by the server lagging too much, that the client aborted, a firewall preventing connections, software on your computer (like Hamachi), or a generally bad connection to the server.
It would help if you could narrow the issue down to just one specific server and or all that you attempt to connect to.
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] Setting user: sworddude
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] (Session ID is token:0d3971181f024525886d652f614970bc:a5362e3ea1634ae88a37b9c714fd6467)
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] LWJGL Version: 2.9.0
Client> 2013-07-03 15:13:00 [CLIENT] [INFO] Reloading ResourceManager: Default
Client>
Client> Starting up SoundSystem...
Client> Initializing LWJGL OpenAL
Client> (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
Client> OpenAL initialized.
Client>
Client> 2013-07-03 15:13:03 [CLIENT] [INFO] Connecting to 208.100.19.148, 25565
Client> Setting up custom skins
Client> 2013-07-03 15:13:04 [CLIENT] [INFO] [CHAT] sworddude joined the game.
Client> Setting up custom skins
Client> Setting up custom skins
Client> Setting up custom skins
Client> Setting up custom skins
Client> java.net.SocketException: Connection reset
Client> at java.net.SocketInputStream.read(Unknown Source)
Client> at java.net.SocketInputStream.read(Unknown Source)
Client> at java.io.FilterInputStream.read(Unknown Source)
Client> at org.bouncycastle.crypto.io.CipherInputStream.nextChunk(Unknown Source)
Client> at org.bouncycastle.crypto.io.CipherInputStream.read(Unknown Source)
Client> at java.io.DataInputStream.readChar(Unknown Source)
Client> at ex.a(SourceFile:257)
Client> at gf.a(SourceFile:40)
Client> at ex.a(SourceFile:206)
Client> at cn.i(SourceFile:248)
Client> at cn.c(SourceFile:16)
Client> at co.run(SourceFile:93)
Client> 2013-07-03 15:13:27 [CLIENT] [INFO] Stopping!
Client>
Client> SoundSystem shutting down...
Client> Author: Paul Lamb, www.paulscode.com
Client>
Game ended with no troubles detected (exit code 0)
Deleting C:\Users\Andrew\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-702379384588
Couldn't delete C:\Users\Andrew\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-702379384588 - scheduling for deletion upon exit
Please post your whole Development Console log.
The error you are receiving may be caused by the server lagging too much, that the client aborted, a firewall preventing connections, software on your computer (like Hamachi), or a generally bad connection to the server.
It would help if you could narrow the issue down to just one specific server and or all that you attempt to connect to.