This morning, the Amazon Appstore reported that it was ready to upgrade itself... that's twice in a week. I'm guessing that today's update was for bug fixes.
Last week's big update did a little bit of UI jiggling, but the most welcome change I saw was addition of a "Permissions" section. Now, I don't have to wait until I install (or, often, refuse to install) to see what the application wants.
Strangely, though, Amazon doesn't use the same descriptions as the Android OS. For example, today's FAotD is a game called "Eve of the Genesis", which wants "full Internet access" by Android's wording. (And that's just about all, so I'm installing it.) Amazon calls this "Open network sockets", which while accurate, isn't terribly clear. They call "Read phone state and identity" (which this game doesn't need, yay) something more pleasant, like "read-only access to phone status".
Side note: "Eve of the Genesis" doesn't have its "move to SD" flag set, but Titanium Backup will take care of that little oversight.
Update: Strangely enough, it's *already* on the SD card. I'm sure I didn't move it using App2SD, Titanium, or the System Info screen. Perhaps automatic install-to-SD is a feature that the Appstore has added? I don't see a setting to turn it on/off.
Any other quirks and oddities I should know about the Amazon Appstore app?
Also interesting: the Amazon Appstore upgrade came just a day or two after Google updated their own Market app. A rushed release would explain the Amazon bugfix a week later!