This looks to be another hash cloning issue.  Through the console I found that the above with "right_plus" works as expected and left_plus returns nothing (as it should).  However, "left_plus"=> "tag" returns *right.  So presumably the refer_to is not getting processed for the left side.

elevated to medium because this bug could cause serious confusion.

  --Ethan McCutchen.....Mon Oct 18 16:09:24 -0700 2010

Any chance of getting this into Wagn 1.6?

  --John Abbe.....Sat Dec 11 00:14:43 -0800 2010

maybe. I recommend working around with right_plus or left_plus.

  --Ethan McCutchen.....Sat Dec 11 11:23:37 -0800 2010

it was a cloning issue. fairly straightforward; kinda embarrassed I didn't see it last time. fixed

  --Ethan McCutchen.....Fri May 27 21:08:18 -0700 2011