This is the error I got when it says "Failed to connect to server! It's probably down!

What is going on here?

java.io.FileNotFoundException: http://www.minecraft.net/resources/
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
        at java.net.URL.openStream(Unknown Source)
        at com.mojang.minecraft.c.run(Unknown Source)
java.io.IOException: Server returned HTTP response code: 403 for URL: http://s3.
amazonaws.com/MinecraftSkins/Mal00nkey.png
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unkno
wn Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
        at com.mojang.minecraft.h.run(Unknown Source)
Caused by: java.io.IOException: Server returned HTTP response code: 403 for URL:
 http://s3.amazonaws.com/MinecraftSkins/Mal00nkey.png
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        ... 1 more
Updating variables
stopping...