If you set the field_display_secs value in your block config to -1, the field will NOT display when a new block is placed, but will default to 30 seconds when a resize is clicked.
Bug Fixes
Clicking a disabled gui function could still allow it to work even when it shows as disabled. For example, clicking who is in field, while disabled would still show who was in the field.
Not really a bug, but unintended lack of usage that is corrected. Using /domain allow <player name> only worked for the players Name, but not the display name (colored nicks etc.) - if the player is online, you can now use either to add them to the field.
API Access
The getAPI() call now exposes access to the new functions which replace the deprecated APIResponse calls.