Getting a valid JSON response, it is being displayed in the JSON tab. Hitting CTRL-F brings up the Add WADL dialog, not search. Right clicking anywhere in the response body does not contain Find/Replace.
Clicking on XML tab shows: "The content you are trying to view cannot be viewed as XML". Clickong CTRL-F brings up WADL dialog. Right clicking in the response area does show a 'Find/Replace' option (which isn't really helpful, because there's not XML data to search through).
This works correctly in 5.0, but is broken in 5.3 and 5.4