Has anyone had any success with using session variables within spork? The only real documentation for session variables is within the blackhole-libs docs, which state to just (define variable (make-session-variable)) which should give the default value of #f to the variable... But doing so raises exceptions in 'cookie-get-changes' whenever attempting to read or write the variable (using (variable) and (variable value) respectively, of course). If anyone has gotten them working can they share insights? or if Per/Mickael has any suggestions?