List View returns 'Undefined variable: details...'

Error returned:
Undefined variable: details in ...\administrator\components\com_joomailermailchimpintegration\views\subscribers\tmpl\default.php on line 106

joomlamailer version: Latest version installed (1.7.2)
Joomla! version: 1.5.22
PHP version: 5.3.8
MySQL version: 5.5.16

EDIT: I should add that this occurs on dev site only. Live site is not encountering this issue. Live site configuration to follow...

joomlamailer version: Latest version installed (1.7.2)
Database Version: 5.1.54
PHP Version: 5.3.6
Web Server: Apache
Web Server to PHP interface: cgi-fcgi
Joomla! Version: Joomla! 1.5.22 Stable