The Sifflet visual functional programming language and aid to understanding recursive functions (http://mypage.iu.edu/~gdweber/software/sifflet/home.html)

#22Input connected to port 2 is switched to port 1

22 When you connect an input to the second (or generally not first) input port of a node, and leave the first "open", then click on apply, the input is reconnected to the first port instead of the second.

-- Is this actually a bug?

O: 2011 Jun 2 R: gdw P: ???