On Feb. 10, Microsoft released version 2.2.550 of the Metro Music app -- also known as the "Modern" Music app and/or Xbox Music app -- as well as the Metro Video app 2.2.550 for Windows 8/8.1. Want to know what Microsoft changed from the last version (Jan. 22's version 2.2.444.4)? Tough luck. The most Microsoft will tell you is that both contain "minor fixes and improvements."
Microsoft's Xbox on Windows release details page -- where one would expect to find a changelog -- reads more like advertising copy. Aside from touting the ubiquitous "minor fixes and improvements," you can see such enlightening change entries as "It's now simpler to buy the albums and songs you want to keep forever. You can redeem Microsoft gift cards, too!" Look a little closer and you'll see that the changelog entry for Jan. 22 is copy-and-paste identical to the changelog entry for Nov. 19, 2013. The page isn't a changelog, it's an inside joke.
Microsoft has rules governing the behavior of apps accepted for publication in the Windows Store. Up until last October, every app update submitted to the store had to have descriptions of the changes made in the latest version -- what you and I would call a changelog. For reasons that escape me, on Oct. 17, 2013, the App certification process dropped that stipulation, formerly known as paragraph 6.7. Prior to Oct. 17, 2013, every app submitted for inclusion in the Windows Store had to have a changelog. A very cursory glance at the Xbox on Windows release details page shows that Microsoft didn't even pay lip service to its own rules. Now, there are no rules. Problem solved.
So we end up with the current situation -- where Microsoft's customers try to guess at the changes that have been made. There's a good example of the quandary on the Winbeta notification blog about the Feb. 10 patch. Ron at Winbeta started by saying yesterday:
Microsoft has not provided a change log for the update, which is typical behavior from the devices and services giant. The change log that is currently listed in the app's description page is very old. Not to be outdone, the Video app also received an update, but just like the Music app, there is no updated change log available.