I have just upgraded from CB 1.2.2 to CB 1.7 on my Joomla 1.5.15 site. Now when a user registers to my site using the CB registration form they get the following message:

If they refresh their browser they are informed that they have already registered, activation email is received and can be clicked to login as usual.

Can anyone give me advice to fix this issue? I use CBSubs.

Thanks in advance, Gerry