Okay, so this is getting to be untenable.
I've reinstalled Java, the technic launcher and the modpack itself - and still it refused to work. Single player is fine; it logs in fine to server hubs, but no attack of the b-team worlds. I've got a crash report (pre-Java reinstall), a crash report (post-Java reinstall, which appears to be in Chinese characters) and no idea what to do.
A little context:
It allows me to attempt connection to servers. It moves on to "logging in..." - and then the text disappears, it hesitates, and then it crashes to the launcher without any kind of notification.
Crash log #1:
http://pastebin.com/bVfGjPAC
Crash log #2:
http://pastebin.com/pk1iwQHC
I've checked around and there don't *seem* to be any other threads for this issue. Help, please!