Random Installation Bug

[Soverinth]

Launcher Version: The latest version.

Operating System: Ubuntu 12.10

Java Version: Oracle Java 6

Antivirus Program:

Description of Problem:

None of the packs are installing. At the end of any one that I try to install it stops and a window pops up saying Unexpected Error!

Don't know what to do. I start the launcher by right clicking the jar and clicking, start with, and selecting Oracle Java Runtime 6. I don't know if that has anything to do with the error or not.

Error Messages:

Error Log:

Stack Trace:

    Exception: IOException

    Message: Failed to download Minecraft! Pack: tekkit Minecraft version: 1.2.5

    Trace:

        org.spoutcraft.launcher.util.MinecraftDownloadUtils.downloadMinecraft(MinecraftDownloadUtils.java:93)

        org.spoutcraft.launcher.UpdateThread.updateMinecraft(UpdateThread.java:319)

        org.spoutcraft.launcher.UpdateThread.runTasks(UpdateThread.java:123)

        org.spoutcraft.launcher.UpdateThread.run(UpdateThread.java:108)