Two blog posts with same title at the same day within the same space produce a "System Error"

Bug Summary

Creating a blogpost with the same title in the same day resulted to a "System Error" instead of a nice error message to change the blog post title since there are already another blogpost with the same title.

Steps to Reproduce

1. Create a new blogpost
2. Try to create another blogpost in the same space with the same name
3. Instead of create a "warning" message and reject the title name
4. Confluence produce a "System Error" page as describe below
   

Stack trace thrown in the logs

2012-03-23 22:32:01,275 ERROR [http-8090-6] [atlassian.confluence.servlet.ConfluenceServletDispatcher] sendError Could not execute action
 -- url: /pages/docreateblogpost.action | userName: admin | referer: http://localhost:8090/pages/createblogpost.action?spaceKey=ab
com.atlassian.confluence.pages.DuplicateDataRuntimeException: A page already exists with the title Testing in the space with key ab

Suggestion

Change the behavior of Confluence when handling this issue to creating a prompt message to change the title name as its already exist