h3. Steps to reproduce

1. Create a page with special characters (example : asd*@$)
2. Create a task list in that page
3. Create another page with the task report macro
4. Note that the macro shows the task from the page in step1
5. Click the link and it shows that Page is not found

h3. Explanation

1. If Confluence page has special characters, it is saved with a pageID instead of the page name
   Example : http://localhost:8090/pages/viewpage.action?pageId=18939906
2. If Confluence page has no special characters, it is saved with the page name.
   Example : http://localhost:8090/display/AbtABRECH/asd

h3. Actual cause of the problem
The URL from the task report macro links are written wrongly.

• Actual URL from task report macro (wrong)

  http://localhost:8090/pages/viewpage.action?pageId=18939906?focusedTaskId=1
  

• The correct link should be :

  http://localhost:8090/pages/viewpage.action?pageId=18939906&focusedTaskId=1
  

The "?" should be replaced with a "&" in the URL.

h3. Solution
Upgrade to Confluence 5.9.x