iMac, iPhoto Corrections -- Last week's issue was a bit unusual for us, which led to a couple of errors in our Macworld Expo coverage. Although I was able to attend the rescheduled keynote address, Adam didn't arrive from Ithaca until the afternoon. So, the two of us ended up writing the issue over a five-hour period in a Starbucks near Moscone with flaky wireless Internet access (by the time we finished, Adam had been awake for 21 hours and was decidedly wobbly). As such, we didn't discover until the next day that the new iMac does in fact contain a fan, rather than relying on convection cooling as we reported. However, we were pleased to learn that it isn't an ordinary fan. It's temperature-activated, like a PowerBook G4's fan, and works at variable speeds depending on the iMac's temperature (so it's likely to turn off shortly after an iMac goes to sleep). What's more impressive is that it was specifically designed to minimize noise, so that the fan is quieter than the hard disk, producing a maximum of 25 decibels. (By comparison, a whisper is usually 20 to 30 decibels at a distance between 3 and 15 feet, and the typical background noise in even a quiet room will be louder than the iMac's fan.) Also, another difference between the iMac and the Power Mac G4 is the Power Mac's L3 cache, which will improve performance over iMacs with similar clock speeds.
We also erroneously reported that iPhoto wasn't capable of printing books on your own printer. In fact, when you're in the Book view, you can simply select Print from the File menu; we were looking for the option in the Share and Book toolbars. [JLC]