We released SiteBuilder 2.378 on Friday, 9 February 2018:

• We've replaced the anti-spam questions with reCAPTCHA to block spam via form submissions, quizzes, forum posts, page comments and the email page contact form.
• In resource booking rules, we've fixed a bug that permitted rules of overlapping unavailability, which caused the rule to become uneditable. It's no longer possible to create a period of unavailability that overlaps with another. You can still create repeating periods of unavailability, as long as occurrences don't overlap.

Technical notes

Improvements

• SBTWO-8171 - Retire anti-spam questions and replace with reCAPTCHA

Bug fixes

• SBTWO-8101 - Long/overlapping resource unavailability rules are not editable in UI