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Windows 7 FTB Launcher 1.0.1 Minecraft 1.4.2 Java 7u9
Exe version of Launcher
On launch, with all mods downloaded and enabled, console throws error: [INFO] From Console: java.lang.SecurityException: class "ln"'s signer information does not match signer information of other classes in the same package
Edit: This also seems to occur with all mods disabled as well.
There are no installed outside those provided in the modpack.
Edit (again): This seems to have been resolved. I was having strange interactions with AVG, and had to disable the linkscanner module. Once that happened, things started working on a fresh folder/install. My guess is that the original issue had some corruption issue with an incomplete download or something.
I'm excited to get this started.