queries on AnyRequest tab don't work when GET method is chosen

The query body is tacked onto the URL in a surprising way, yielding a malformed query, and as it happens, all docs in the index are always returned. Described in perfect detail here:

http://stackoverflow.com/questions/12195017/different-result-when-using-get-post-in-elastic-search

I found this very confusing as someone first approaching ES and the tool.