There are a lot of settings located within the profile tab that control how everything is displayed, you are notified about messages, personal settings etc...
I would suggest that everyone check these controls out as you can do a lot of things from there to customize your personal experience here on the message board.
Here is a list of all the items you can control.
Account Related Settings
Forum Profile Information
Look and Layout Preferences
Notifications and Email
Personal Message Options
Edit Buddies
You can set how the messages appear for you, from newest to oldest, instead of oldest to newest, by going into your "Profile". Then select "Look and Layout Preferences", place a check mark in the box next to "Show most recent posts at the top". Then click on the Change Profile button that will save the changes.