Customize home page option shows red x instead of a icon next to a task on the home page.
Icon is not loaded properly via shell design. Navigate to Admin//Application//Shell Design//Tasks and find the task in question. Edit the one in question and search for a Small Image that is 16x16 in size.
Steps to Duplicate
1. Go to home page 2. Click on customize 3. Customize home page screen opens and on a given functional area you may notice that instead of a image icon you have a red x showing.