User macros appear to be ignoring the default value, this leaves an undefined value that is that is passed verbatim in the html.

      For example, the line

        1. @param width:title=Width|type=string|default=600|desc=Width in pixels

      plus this invocation (note: width not set)

      {iframetest:source=http://www.evernote.com|height=500}

      produces this code

       <p><iframe width="$paramwidth" height="500" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="http://www.evernote.com"></iframe>
      <br /><small><a href="http://www.evernote.com">View full page</a></small></p>
              </div>
      

      "paramwidth" has passed through to the html as unknown

      I'll document the full example iin a comment.

              Unassigned Unassigned
              02128eaf8ea1 Jim Birch
              Affected customers:
              39 This affects my team
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                Created:
                Updated:
                Resolved: