Directory Studio displays "Invalid Certificate" after userCertificate upload

After an attempt is made to add the pkiUser objectclass and a userCertificate attribute within Directory Studio, Directory Studio allows both a PEM formatted and DER formatted certificate to be correctly loaded into the certificate editor.

Once the userCertificate attribute was added, attempts to display the certificate in the LDAP browser fails with "Invalid Certificate", and when attempting to edit the certificate the attempt fails with an exception that cannot be cut and pasted.