User summary:
The October 8th playtest package added Magic Items for the first time, and updated the Caves of Chaos adventure and DM Guidelines to match these. The Bestiary was also updated somewhat.
This playtest package included:
Playtest Packet (2012-10-08)
D&D Next: October 8 Playtest (1 page)
D&D Playtest: How to Play (18 pages)
D&D Playtest: DM Guidelines (13 pages)
Creating a Character (4 pages)
Classes (18 pages)
Races (7 pages)
Backgrounds (8 pages)
Specialities (6 pages)
Spells (13 pages)
Equipment (9 pages)
Magic Items (27 pages)
Bestiary (18 pages)
Character sheet (2 pages)
Pre-Gen: Dwarf Fighter (2 pages)
Pre-Gen: Elf Wizard (3 pages)
Pre-Gen: Halfling Rogue (2 pages)
Pre-Gen: Human Cleric (3 pages)
Pre-Gen: Human Fighter (2 pages)
Reclaiming Blingdenstone (45 pages)
The Caves of Chaos (23 pages)