Build 2014 is only a few weeks away, and the world is expecting Microsoft to finally unveil Windows Phone 8.1. The beta SDK is already in some hands, and we’ve even heard some 8.1 hardware is now circulating too for some devs. This is unsurprising, because Microsoft is not going to announce this thing with no release details on April 2. Quite the opposite, as Redmond appears to be taking a “hit the ground running” approach, making the OS preview-update available that day with new hardware only a few weeks later.

In that regard, seeing Microsoft check app compatibility when submitting new XAP files to the Store should not be a shock. After all, they probably want to test some things out, and we’re sure little nuggets like this will make an appearance between now and April 2. The change in the Store happened in the last five days, with people noticing late last week.