Was playing today just fine, then all of a sudden I get a weird,
whited-out Mojang logo that hangs, then after a bit coughs up this crash
message:

java.nio.BufferOverflowException
        at java.nio.DirectByteBuffer.put(Unknown Source)
        at java.nio.ByteBuffer.put(Unknown Source)
        at fu.a(SourceFile:148)
        at fu.a(SourceFile:62)
        at net.minecraft.client.Minecraft.i(SourceFile:977)
        at net.minecraft.client.Minecraft.run(SourceFile:595)
        at java.lang.Thread.run(Unknown Source)

I deleted the bin directory & reinstalled Java, but the problem
persists. I get the same error running the game in Firefox. Another
computer in the house runs my account just fine.

Any help will be greatly appreciated. Thanks.