"Entry could not be found" message after replying to a blog post on a User Group private page

• Type: Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 6.1.20 EE GA2
• Fix Version/s: 6.1.30 EE GA3, 6.2.0 CE M5
• Component/s: Blogs, Collaboration, Pages > Pages Customization
• Labels: None
• Environment: Liferay Version: 6.1 GA 2; Operating System: Windows 7; Application Server: Tomcat 7.0.X; Java Virtual Machine: Java 6; Database: MySQL 5.5

Steps to Reproduce:

1. Install liferay-hotfix-1070-6110.zip on a clean 6.1.10 bundle
2. Login as the admin user [email protected]
3. Control Panel->create a user group called "myUserGroup"
4. Go to Actions -> Assign Members. Assign the admin account ([email protected]) to the user group "myUserGroup"
5. Click Back to view the myUserGroup
6. Go to Actions-> Manage Site Pages
7. Click on Private Pages
8. Create a private page called "MyPrivatePage"
9. Go to "Customization settings" and enable both columns.
10. Go to the upper right drop down menu and select: -> My Private Pages.
11. Go to private page created in step 5, "MyPrivatePage"
12. Go to user's page which has (user screenname/~/user group id/page name)
13. Add the blog portlet
14. Add blog entry and click Publish
15. Click on blog title and click on "be the first" to reply
16. Add a comment and click Reply

Intended Result: the comment would publish to the blog entry.
Actual Result: an "Entry could not be found" error message is displayed.