Update #1: Rovio has since taken to its blog to address the issue. Regarding Android in particular, the company has this to say:
On Android the issue occurs because, for technical reasons, the purchase history cannot always be restored on that platform. Our customer support is aware of the issue and we would recommend contacting us at [email protected] to anyone who is still experiencing this.
We've reached out to the company for further clarification. Read More
Anyone who has made the jump to Android 4.3, which admittedly isn't that many people right now, may have noticed that some applications now plant persistent notifications in the status bar. We offered this as a disclaimer in our post about manually updating a Nexus 4 to Android 4.3. Turns out, this is completely intentional. Android now forces persistent notifications on unkillable apps that run silently in the background. This is an attempt to call attention to behavior that isn't quite okay. Read More