We are using the Berlin theme in version 2.0.4 and recently I have been getting error messages on the screen (ie. Notice: Undefined index: Item in /var/www/html/omeka/plugins/ExhibitBuilder/models/ExhibitPage.php on line 73). This usually happens when I am adding a hyperlink to text in an exhibit page. No further issues are evident. The links work fine, but what is producing the error? Should I be doing something different so as not to produce an error? Any suggestions or information about this would be greatly appreciated.