I use JNews and I have installed the latest version of CB and it seems to me that since that time in the back-end the fields/radiobuttons "receive HTML" is not filed with default HTML and "register for newsletter" in the tab newsletters is empty although the user clicks on Yes.
Also the registration-date is not wright and comes like 2010 in de the database in stead of a translated date.
I doubt its CB related as it most likely has something to do with a CB plugin installed by jnews - best to check on the jnews forums for similar issue.
Wish I could help more but I have no experience with jnews.
nant