So if you've been following the Technic news you'd know that the Technic devs have been creating a new API and launcher (hopefully you noticed you were using a different launcher). They recently rewrote their API because it was causing numerous issues with servers and launcher stability. THE GOOD NEWS? They think they have fixed it now and hope to see less server crashes. ADVICE given if you see some weird instability in your mod packs or launcher is to give it a while to update any bad, cached data. Hopefully Tekkit will die less now - we can only hope.