<i>In trying to find a way to notify developers of D7 <span>API</span>
changes, the best solution we've come up with is to formally publish to
the Drupal Development Mailing List. <span>API</span> <span>change</span>
notifications will occasionally be posted here
with a title starting with "Drupal 7 <span>API</span> <span>Change</span>
notification"</i><br><br>Recently the way <b>forms</b> use <b>#builder_function</b> was changed significantly, and in many cases it should no longer be called.
(<a href="http://drupal.org/node/735800#comment-3101122" target="_blank">issue impact summary</a>). If your module does anything with #builder_function, you'll want to read this carefully.<br><br>An additional note: If you are chasing HEAD in D7, you should subscribe to <a href="http://drupal.org/project/issues/head2head">all issues of the HEAD2HEAD</a> module, which is the best indicator of when your current D7 install is going to be broken by a database change.<br>
<br>Thanks,<br>-Randy<br>