OK, just because I’m hiding out at the BCS why not start a list of examples under the following fun headings?

User issue type 1: Technical issue

User issue type 2: Design issue
Example 1: To set up a new ringtone on your HTC Desire is easy. Except because the way the phone interface is designed it’s not obvious that there is a slider which you need to access to view all the available ringtones.

User issue type 3: Confusion between design and technical

more white text:-)