[Mathias]

Here's the relevant sections of the FAQ for the 2.7 update (this is the FAQ that's available from the help menu):

Bug Fixes

• The default Primary/Secondary attack types for natural attacks, from the Bestiary, page 302, have been implemented.
• If a character has natural attacks, and has equipped a manufactured weapon, the natural attack becomes secondary.
• If a character has one one natural attack type, that attack becomes primary, regardless of the default.
• If a character has only one natural attack (ex: Claws x2 would not count, but a Bite would), that attack gets x1.5 STR mod.

Data File Authoring

• If a race's attacks differ from the default attack type, add the Helper.Primary tag to force them to be primary, and the Helper.NatOverSec tag to force them to be secondary. Existing races should not need to be changed, since they already applied the default Primary/Secondary state themselves.

Natural attacks in the editor are on my to-do list.