This is a bugfix release for 0.10.2.00.
This only fixes one bug: Playing following linking sounds in SMP was causing players to be kicked from the game.
To recap: there is only one download (found at the bottom of this post); This file is the universal install for client and server; it no longer goes in the jar.
Mystcraft goes in the mods folder.
If you are still lost after 0.10, check out Direwolf20’s Mod Spotlight!