Right now unread vs read posts are handled by cookies on your computer.
The new system would store that info on the server.
It seems much better to me. I'm going to try it.
Here's some info from the FAQ if you want to read it.
What are the pro and contras for the cookie system?
* Advantage: With larger forums the normal cookie system has a faster page-loading than the UPI2DB system, because this system must load the information about read posts from the database. A further advantage is that the data will be stored over many months, when you don"t delete the data from you"re machine. This is interesting for users who only read the forum every 2 month.
Disadvantage: The largest disadvantage so far of this system is that you automatically mark all posts as read by closing the browser. A further disadvantage is, that edited posts won"t get marked as unread again and therefore won"t find any attention any more.
What are the pro and contras for the UPI2DB system?
* Advantage: Unread posts still stay unread, if somebody closes the browser, you won"t have to read all new posts at one time. Posts can also get marked as read for a time of with the UPI2DB system. Forums which are not interesting for you, can be marked as "permanently marked read", until you change the option. Edited contributions are marked as unread with a the note "Edited" and additionally have another color to seperate them from normal unread messages. A new search function permits to look for unread and edited contributions only. When the Admin activated to display edited contributions in the top of the Topics, edited contributions will be displayed at the first line of the topic.
Disadvantage: At larger forums with many posts and users, it may take longer to load the page. The information whether a contribution was read, remains stored only over a certain time period, afterwards posts will automatically be marked as read. The standard time period is set to 30 days. But this may variy on the settings from your Admin.