If you sync IMAP mail account settings from your computer to iPhone or iPod touch, and the IMAP folders on your computer are all shown under your Inbox folder, then it might not work as expected on the device.

For help with contacting the iPod software update server or iPhone software update server for Windows XP or Windows 2000, see this article.
Some customers may notice the following alert message when trying to update or restore an iPod in iTunes 7 or later:
"iTunes could not contact the iPod software update server because you are not connected to the Internet. Make sure your Internet connection is active and try again."
If restoring an iPhone, you may notice this alert message:
"iTunes could not contact the iPhone software update server because you are not connected to the Internet.  Make sure your Internet connection is active and try again."
Internet access is required to download iPod and iPhone software updates. However, if you are able to connect to the Internet with Internet Explorer and can also access the iTunes Store, see the solution below to resolve this issue.

If your Nike + iPod Sensor runs out of batteries and you have purchased a new Nike + iPod Sensor, you may need to "unpair" your original sensor from your nikeplus.com account in order to continue uploading workout data from your new sensor to the same nikeplus.com account.

If something is not working right, restarting or resetting iPhone will likely solve the issue. Learn how to turn on/off (restart) and reset iPod touch and iPhone. 

The Nike + iPod Sensor’s battery is not replaceable or rechargeable and has a life of over a thousand active hours. The sensor has a sophisticated built-in power-management system, allowing the sensor to consume power only when active (that is, when it senses motion).