The above is the only logical correct solution but if you are one who likes to use old software or stuck in the'its to hard to upgrade' mindset (mind you I have the slowest, cheapest DSL you can get at home, and it took me 24 seconds to do the 1.5.4 upgrade to 1.5.5

We have found 2 solutions, Please review below to determine best fix method for you. (theirs actually 3 ways to fix this, but one requires you to edit every single article, and if you have over 400 articles like us, thats really not a solution)

Fix #1

If you have this problem, Go into Articles Parameters under Article Manager and select no for Show Titles. They are going to show no matter what. This must be a new bug introduced to 1.5.4 having it selected to show Title will show title twice. Submitting a bug report now

Fix #2

Another solution. Go into Menus, Main Menu, Click on Home,

• The Page Title parameter, which is a text field. In this example, the Page Title parameter value contains the legendary "Welcome to the Frontpage" greeting.
  
• And, the Show Page Title parameter, an option field allowing choices of "Yes" or "No."
  
  
  

Select Yes and this problem should go away. Maybe this is a better solution for you. If you use a menu item that does a category list view, the first solution will break all your links as Eric recently pointed out to me.