Yesterday, Microsoft released a new Office Insider Preview build for Macs on the Slow ring, bringing the build number to 15.27 (161007). The news comes one week after the company released 15.27 (161003).
As you can probably imagine from looking at the version numbers, there isn't much that's new in 161007. In fact, Microsoft hasn't even published a changelog from the last one, simply updating the post to reflect that a new build has been released.
This isn't all that uncommon. The company likely found a bug that it had to patch before releasing 15.27 to the public, which should happen within the next week or two.
Here's the changelog for last week's update, which is what will be included when it reaches the Production channel:
More functions: In Excel, use CONCAT or TEXTJOIN to shorten your text formulas, or try the forecasting functions to help you see the future. (Feature requires an Office 365 subscription.)
Trim audio and video files: In PowerPoint, trim unwanted content from the beginning or the end of your audio or video files. You can also trigger an animation by using a bookmark in your media file. (Feature requires an Office 365 subscription.)
Make sure your notes are accessible: In OneNote, find and fix accessibility issues in your notes using the Accessibility Checker on the Tools menu.
Try our new designs: In OneNote, we've made some changes to help you get around your notes. Check them out by turning on Preferences > General > Enable experimental features, and let us know what you think!