Next link redirects to error page in a thread

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.0 CE RC4
• Fix Version/s: 6.2.0 CE RC5
• Component/s: Collaboration, Collaboration > Message Boards
• Labels: None
• Environment: Tomcat 7.0 + MySQL 5. Portal master GIT ID: 56cb81ef93ace8910d7212056d466f0233ba177a.
• Story Points: 3
• Fix Priority: 3

Steps to reproduce:

1. Add Message Boards portlet to a page.
2. Create a thread on the root category.
3. Click "Next" link in the thread.

Expected result:
The "Next" link should be disable and gray.

Actual result:
The "Next" link is clickable and it redirects to error page.