Adobe has released an update to its Flash Player, bringing it to version 18.104.22.168, which is available from here.
Adobe claims to have fixed a bug in which the audio from video playing in the previous slide continues to play when the next slide is loaded.
There are also a total of seven vulnerabilities which are fixed. Adobe rates these as being ‘critical’, as they could lead to code execution. If you have Flash Player installed, this sounds like another important update.
(Updated 1800 UTC on 9 May 2017, after Adobe finally released details of the fixes included.)