Joomla 1.0.13 is NOT compatible backwards.
CB 1.0.2 can't run on Joomla 1.0.13.
Please wait upcomming CB 1.1 release for Joomla 1.0.13.
I'm part of Joomla Q&T team and I'm sorry to learn through this channel here that Joomla 1.0.13 was released, while I have given a vulnerability report introduced by that release.
Sorry to have to give our advice:
Do NOT upgrade to Joomla 1.0.13.
Joomla 1.0.13 does NOT allow downgrading in case of problem and could NOT be tested by CB testteam, to the contrary of all previous releases.