I am reposting my question since we upgraded media wiki to 1.4.7 and are still experiencing the same behavior.
The internal wiki links in MediaWiki are either blue (click to view an existing article) or red (click to edit a new article). This coloring applies to the tabs at the top as well. We have a number of stub articles in our wiki that are showing their discussion tabs as red, even though the discussion does in fact exist.
It is only happening on the articles tab (discussion is red in color when it is not new) but it doesn't happen for any other tabs.
Here's an example: http://www.taxalmanac.org/index.php/IRS_Enrolled_Agent_Exam
Thank you.