dashboard_contact.content column data type is not large enough for report data

Getting fatal error on dashboard if I take our default (generated data) and set the Activity Report to be displayed as a dashboard dashlet (to see the error, load Firebug and click to open the ajax request in a new tab):

Database Error Code: Data too long for column 'content' at row 1, 1406
UPDATE civicrm_dashboard_contact SET dashboard_id = 9 , contact_id = 102 , column_no = 1 , is_minimized = 0 , is_fullscreen = 1 , is_active = 1 , weight = 1 , content = ... etc.