There are a couple of changes implemented in the new BB.

View First Post Only
If you are not logged in using your user name and password- you will only be able to see the first post in a thread. If there are 6 replies to the original post- and you are just lurking- you will not be able to see the replies.

Hyperlinks
You must be logged in with your username and password in order to click on hyperlinks

Pictures
Not set up at this point but coming soon! In order to see pictures posted in threads you will need to be logged in using your username and password.

Auto Prune Members
Members that do not log in with their username and password for more than 6 months will automatically pruned from the member database. Your posts will be retained but your username and email will roll into a banned list and cannot be recovered by the admins.

Edit/Delete Posts
You will not be able to delete a post after 1 minute. Editing posts function is only available for 5 minutes after your initial post. This allows for plenty of time to correct typos. After this.....If you post it- then you will own it.