[Boulder]

There's also an issue with fast forwarding. I FF'd at 8x for some time, then resumed playback at normal rate at which point both video and audio froze. I have observed this several times.

Also the dim screensaver doesn't work, the dimming is not applied after the specified time.

Were you able to reproduce these issues? I retested them last night and they still occur in the latest build. While testing, I noticed that the quick jump forward also sometimes makes video and audio freeze. If I then pause and resume, the playback indicator shows that the clip is playing but nothing happens on the screen (and no audio either). Quick jumping backwards fixes the issue.