Steve, -proposed updates isn't actually a PPA. You can enable it in the Software & Updates app on the Developer Options tab. I recommend installing just the specific -proposed updates you want to test. And then disable -proposed updates again. You'll still regular updates then.
Dražen, could you file a new bug for that issue?
Steve, -proposed updates isn't actually a PPA. You can enable it in the Software & Updates app on the Developer Options tab. I recommend installing just the specific -proposed updates you want to test. And then disable -proposed updates again. You'll still regular updates then.