I have taken over a website as webadmin that was using a broken version of CB (v1.2) which I have upgraded to the latest CB v1.8.1. It resolved all issues but one. The registration page shows no entry fields.
www.woodlandscycling.org/index.php?option=com_comprofiler&task=registers&Itemid=102
Everything else works fine with CB as far as I can tell.
Joomla - v 1.5.25 stable
CB - v 1.8.1
administrator/backups/ Unwritable
administrator/components/ Unwritable
administrator/language/ Unwritable
administrator/language/en-GB/ Unwritable
administrator/modules/ Unwritable
administrator/templates/ Unwritable
components/ Unwritable
images/ Unwritable
images/banners/ Writable
images/stories/ Unwritable
language/ Writable
language/en-GB/ Writable
language/pdf_fonts/ Writable
media/ Unwritable
modules/ Unwritable
plugins/ Writable
plugins/content/ Writable
plugins/editors/ Writable
plugins/editors-xtd/ Writable
plugins/search/ Writable
plugins/system/ Writable
plugins/user/ Writable
plugins/xmlrpc/ Writable
templates/ Unwritable
Cache Directory /var/www/woodlandscycling.org/public_html/cache/ Unwritable
Cache Directory /var/www/woodlandscycling.org/public_html/administrator/cache/ Unwritable
Log Directory ($log_path) /var/www/woodlandscycling.org/public_html/logs/ Writable
Temp Directory ($tmp_path) /var/www/woodlandscycling.org/public_html/tmp/ Writable