Thread:BunsenH/@comment-25404524-20160604221042/@comment-24577221-20160605014712

I'm sorry -- I wasn't reading your message carefully enough. I think I've figured out the problem. Those special variables, $1 through $4, have to be added in source mode as "$1" and so on, rather than just as $1 etc. What tricked me was that all of them worked as-is except for the one with the link to my wall.