RT3: attempted reply with templates failing

What to do about "This transaction appears to have no content"
when it does have content (response content) ?

My config:

global scrips: none
global templates: default set

local queue scrips: 1, “resolved”
“On resolve Autoreply to Requestors with template Autoreply”

In template Autoreply:

Greetings,

This message has been automatically generated in response to the
creation of a trouble ticket regarding:
"{$Ticket->Subject()}",
a summary of which appears below.

There is no need to reply to this message right now. Your ticket has been
assigned an ID of [{$rtname} #{$Ticket->id()}].

Please include the string:

     [{$rtname} #{$Ticket->id}]

in the subject line of all future correspondence about this issue. To do so,
you may reply to this message.

                    Thank you,
                    The Management <rt@domain.com>

{$Transaction->Content()}

And then the reply sent to a requestor looks like the above, but with
"This transaction appears to have no content" instead of the actual content.

Thanks folks for the help!