Mac OS X 10.1: Question Mark Appears in Dock

A question mark may appear in the Dock where an application formerly appeared. This affects Microsoft Internet Explorer when upgrading to Mac OS X 10.1.
Symptom

The Dock may have one or more question mark (?) icons.


Solution

This occurs whenever an item in your Dock cannot be found. An item may not be found when:

For example, the Mac OS X Installer replaces Internet Explorer with a new and improved version. If you had Internet Explorer in the Dock, you would follow these steps to delete the question mark and replace it with an icon of Internet Explorer:
Published Date: Feb 17, 2012