A new build is now available for download, which fixes the scheduled playlist bug
We would like to send out a sincere apology to everyone that was affected by this issue, and thanks to all who submitted reports about this issue, especially to those that provided us with access to their log files, with the Next song debug enabled. This has helped us immensely in identifying and fixing the problem.
We do fully recognize how disruptive a bug in the playlists system can be, so we implemented a way for it to be tested in an automated manner. We also developed a number of tests to ensure that the basic playlist functionality never breaks like this again. If we encounter any further issues with specific combinations of playlists in future, we'll be able to add tests for those as well, which should make it much more difficult for regressions like this to occur in future.