Hi,
I'm trying to install cbb 3.0.8 in a local machine before upgrading it on my website and I noticed that, doing the upgrade from newbb2.0.2,
overwriting the newbb module newbb with the one provided in cbb 3.0.8 package, when I read the posts in a thread for each user on the right I see the word Guest_ but I'm sure that I wrote the posts using my registered user "magowiz".
You can see it here :

http://img245.imageshack.us/i/thread.jpg/

If I go to the forum to see the threads list I can see my username in the "Poster" and in the "Date" columns.

The image of threads list is here :
http://img29.imageshack.us/i/threadlist.jpg/

What should it be ?

It seems it was an issue with the theme zetagenesis bundled with 2.3.3 core , if I switch back to default theme in system preferences the problem goes away