Right on the heels of a massive patch which changed classes, made PvP adjustments, and shifted talent abilities another sweeps in to correct a few bugs and give players yet another respec. While it wasn't specified whether there was confusion regarding the changes or something else was tweaked, apparently Blizzard felt another chance was due everyone.
* In order to address issues with the dual talent specialization system, all players will have their talents points refunded. Players who have purchased dual talent specializations will have both specializations reset. Glyphs will not be affected by this reset.
You can find the patch notes on the official forums.