n my phpMyAdmin installation, version 3.1.1, none of the old style config settings [...] had any effect, and the solution was terribly elusive. "view blob", "show blob", "display blob", all that Google suggested were people asking the same question, at various ages of the internet.

Finally, after wading through negative comments of forums and not getting much help at all, Matthias dug into the source and found a session variable that can be set to true and the content magically appears.