I have setup moodle-mahara and the basic logging in to the site seems fine.
When testing the 'Export to portfolio' link for an uploaded file (see MDLQA link, step 3 in the test) you get the following error:

Warning: Illegal string offset 'name' in /opt/kaltura/app/alpha/web/m25beta/lib/portfoliolib.php on line 1140 Warning: Illegal string offset 'name' in /opt/kaltura/app/alpha/web/m25beta/lib/portfoliolib.php on line 1140

The URL that appears in the address bar for the page is:
http://kaltura.hull-college.ac.uk/m25beta/portfolio/add.php?ca_cmid=5&ca_sid=1&ca_area=submission_files&ca_component=assignsubmission_file&sesskey=qJfZ7D1Giy&callbackcomponent=mod_assign&callbackclass=assign_portfolio_caller&course=3&callerformats=file%2Cleap2a&instance=1