prefix- and suffix-attributes

Sorry to bug you again but I ran over another problem the other day. I was using prefix="" and suffix="" macro-attributes to display embedding code for my links, for example:

It worked fine for weeks but all of a sudden (all of my collegues told me that they didn't change anyting), antville started displaying the prefix="" and suffix="" attribute inside the a-tag as well.

Any ideas where that behaviour could come from?