Turned on debug mode.
Went to user management tab in CB and tried to activate a user, received error. The debug output pointed me to he jmoodle plug in (hook). Looked at the PHP for the plugin (third party) and the _community table was in there. Changed the PHP code to reflect the _comprofiler table instead.
Tried same process again. Received a different error, referencing the same php.
Checked with site owner (me) and determined that we are not using jmoodle anymore (installed as a test) and uninstalled jmoodle and associated plugins.
Tested again and issue was resolved.
Unless 2.06 changed table names or the way plugins interact, I am also at a loss. However it is all working now.