If someone create a meeting with a description, the description is not being showed in the version 3.0, to fix this is necessary change this line on the file

~/moodle/mod/bigbluebuttonbn/classes/output/view_page.php

on the function export_for_template

'description' => $this->instance->get_meeting_description(true),

by the line

'meetingdescription' => $this->instance->get_meeting_description(true),

Melvyn