According to people familiar with OS X Server 3.1 Preview build 13S4076f, the server software addresses a Profile Manager problem in which syntax errors appeared in migration SQL.
There are two known issues with the current build. In Profile Manager, the "+" and "-" buttons within the payload editor do not add or remove a payload when administering from an iPad, while bot creation may skip from Step 2 to Step 4 in the Xcode Server Web UI. For the latter, Apple suggests restarting Safari as a workaround.
In order to test the software, users must be running the recently released OS X Mavericks 10.9.2 beta maintenance update on their Mac. With that update, Apple is asking developers to again focus on Mail, which has seen a number of problems since it launched with Mavericks last October.
Developers can download the latest OS X Server 3.1 Preview via Software Update or Apple's developer portal.