You need to have the post count enabled for Kunena in order for it to enable within CB. Could not confirm your results; appears to be working fine. Please check the following configuration.
Kunena > Forum Configuration > Plug-ins > Userlist
Show Number of Posts: Yes
If the above is not set then post counts will not show. You need to also ensure you've configured the Forum integration plugin in Plugin Management to show in the Status tab instead of in the Forum tab if you're using the post count field.
Post edited by: krileon, at: 2010/12/10 21:34