Added notices about the upcoming 2.0 version of the API, including: Upcoming Changes to the Buzz API.

New Macros : BID_TIME_UTC and REFERRER_URL_ESC.

Added new field frequency_cap_type to both Campaigns and Line Items. Updated guide Frequency Caps with definitions and other minor edits.

We have made a major upgrade to the docs portal. Changes include:

Fixed budget_type field on Campaigns and Line Items APIs to indicate that it is not a required field (defaults to 0)