Pretty sure that
* (bug 5210) preload parser should parse <noinclude> (as well as <includeonly>)
* (bug 8785) Pipe trick should work with colon functions
* (bug 4099) Pipe trick doesn't work when emptiness is only provided by empty
template parameter
* (bug 845) [[#foo|]], [[/bar|]] should be equivalent to [[#foo|foo]],
[[/bar|bar]] (new use of "pipe trick")
* (bug 21660) Support full-width commas for pipe trick
* (bug 7264) Magic word to give Page Title as if pipe-trick performed on it
{{pipetrick:}}
* (bug 20339) Allow using the pipe trick in log reasons
Aren't API changes. Moved to bug fixes (still not right, but more applicable)