This build includes a few bug fixes, the most important probably being a fix for a memory leak in long-running physics games. Now these games should be able to run indefinitely without eventually running in to a crash. There's a couple of other updates as well.
Since the release of Construct 3, the release cycle of Construct 2 has slowed down as we have moved to only maintaining it with bug fixes. New features will only be added to Construct 3 at this point. Consequently we think that our past release schedule of several beta releases followed by a stable release will be too slow from now on. We think a better cycle would be to simply alternate beta and stable releases, so that fixes reach the stable channel more quickly. Of course beta releases may still occasionally have new issues requiring a follow-up beta release, but the general idea will be to do a beta release, ensure there are no new issues, then move those fixes to the stable channel. This ought to be a better fit at this point in Construct 2's lifecycle. If you want more frequent updates and new features, consider upgrading to Construct 3.