After a hard reset on 635 with Windows 10 build 2, The store did not find any updates for default app, so I had to manually hunt down each MSN app and update it. The only apps not updating are Video and Music:
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They no matter what I do, refuse to update themselves. Now Music can't seem to stream music, and cannot read album art (downloaded from Music app on PC and moved onto phone because the current phone app cannot download any music from OneDrive or Music Pass).
And apparently Cortana has lost her voice. I tried downloading a speech pack but...
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On top of this, Cortana cannot open apps, set reminders and alarms.
Most apps seem to run just fine aside from crashing out at random intervals. The only apps that cannot run whatever I do are Pin.it (WP's best Pinterest client) and the Insider Hub. But what annoys me the most is how the text for notifications and pop-ups is bigger, so it renders incorrectly. I hope in a future build they give the option to return it to the old size, but also for people who like the larger text.