Via [url=https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds]HLDS[/url]:

[quote=Valve]- Fixed another exploit that allowed clients to have an out-of-date, corrupt, or modified version of items_game.txt
- Fixed clients not downloading *.dx80.vtx, *.dx90.vtx, and *.sw.vtx files from servers running custom content
- Fixed sv_pure defaulting to -2 instead of 0
- Fixed font issues for Mac clients
- Made the Spellbook Magazine a base action slot item for players to equip and use when playing on a server that uses Halloween Spells
- Fixed not being able to wear Halloween-restricted cosmetic items on Halloween maps outside of the regular Halloween and Fullmoon events
- Halloween spells can now be enabled and controlled on servers via ConVars tf_spells_enabled and tf_player_spell_drop_on_death_rate
- Halloween spells can now be enabled by map authors via HolidayEntity by setting the flag HalloweenSetUsingSpells[/quote]

Rumor has it:

- Size is ~25 MB