About two months after Apple released iPhone software 2.2, Apple today released 2.2.1 for the iPhone. Apple says that the software update provides two fixes. First, it improves the stability of the Safari web browser. Second, it fixes some problems with saving pictures in an e-mail message to your camera roll. Apparently the update does not add any new features to the iPhone, but it is always nice to improve the stability of Safari.
If you are interested in the history of Apple's iPhone updates, there is a Wikipedia page that lists them all. Looking at the most recent updates, the major release of the 2.0 software came out in July of 2008, followed by two minor bug fix updates in August, the major 2.1 update in September, the major 2.2 update two months later in November, and then today's minor bug fix update two months later. I wonder how long we will have to wait to see an update with new features? Another two months?
To upgrade your iPhone, connect it to your computer, run iTunes, and click the Check for Updates button.