I used to use
---===---
to signify my scene breaks. Now that ff.net filters them out, I try to remember to use
xxxXXXxxx
however, when posting, I'll do a last-minute sweep using the document editor, and tend to change those into the built-in ones.
Every once in a while, I'll forget, though, and use the ---===--- which disappears and leaves my fic with an awkward flow.