Moodle reports that there are no available Mahara pages or collections when a Mahara page or collection contains the control character 0B

Steps to reproduce:

1. Create the 0B character to your browser using the &#11 ; (the output will be a rectangle )

2. Copy this character into the Mahara DB view table under the description field (make sure the owner is the same as the Moodle user who trying to retrieve the page)

The reason for the issue is due to the xmlrpc_decode() function, when this function is converting XML data to native PHP types and if that XML data has the control character 0B then it returns no data).