Google is rolling out an update to the Android Market this week containing many changes, the most notable of which is the removal of the 24-hour window to return an app for a full refund. Now you only have 15 minutes.
Currently, one of the best things about the Android market is the fact that if you don't like an app (or if it's glitchy, crashes or a CPU hog), you can return it for a full refund within 24 hours. That window's been reduced to 15 minutes, "since most users who request a refund do so within minutes of purchase". Unfortunately, this means it may be harder to get a refund for apps that are a bit harder to discern as poorly coded (since you likely need more than 15 minutes to find out if it hogs your resources or decreases your battery life), but it's just something to watch out for — make sure to test out your apps quickly if you think you might want to return them.
Other changes to the incoming Market update include a new cover flow-like carousel on the home and category screens, so you can easily flip through popular applications. There are also two new categories for Widgets and Live Wallpapers in the store, which is nice for organisation. Hit the link to read more about the update, and let us know how you think you'll be affected (or not affected) in the comments. Note that these changes will be rolling out over the next two weeks, so you may not see the new Market show up immediately.
Android Market Client Update [Android Developers Blog]