iMovie for iPhone 4: iMovie may quit when exporting project with several still photos
iMovie will sometimes quit while exporting if your project contains several still images.
iOS 4: Exchange Mail, Contacts, or Calendars may not sync after update
Immediately after updating to iOS 4, some users may notice that Exchange ActiveSync Mail, Contacts, or Calendars do not sync, or sync very slowly. In addition, some Exchange Server administrators may notice their servers running slowly.
AT&T: iPhone is unable to view new voicemail
iPhone displays an "Inbox is full" message when attempting to check voicemail. This message indicates that your AT&T voicemail box is full, so you need to delete messages that are stored on the AT&T voicemail server.
This article explains how to ensure that you are deleting voicemail messages that are currently stored on the AT&T voicemail server.
Copying personal photos and videos from iPhone, iPad, or iPod touch to your computer
On iPhone, iPad, and iPod touch, you can save images from a variety of applications (such as Safari, and Mail) to your device. With your iPhone, you can also capture photos using the built-in camera and video footage* with the iPhone 3GS and iPhone 4. The following document will help explain how to import this media content from your device to a computer.
iPhone 4: Using FaceTime behind a firewall
For most Wi-Fi networks, FaceTime video calling will just work. If you are on a Wi-Fi network that is behind a firewall, see below.