The FAA has just done a major rewrite of part 23 and the new regulations have been published. Almost all the previous regulations are now gone, although of course they're still available from sites (like ecfr.gov) that can display previous versions.
That means, almost all the links and quotes on this site that refer to part 23 are now outdated. Statements like "FAR 23.51 requires that..." are no longer correct: first, the section is gone; and second, the requirement itself has changed.
Compare these two sections, for example:
Worrying about this might seem like pedantry, but on the other hand we're talking about regulations, so accuracy is kind of important :-)
What - if anything - should we do about this? Trying to update all the existing questions and answers with a comment about old vs. new seems like a huge task. (Or is it? Do we have any way to find out?) Perhaps we could create a canonical question and answer about the rewrite, and refer people to it as/when inconsistencies or questions arise? Other ideas? Have any other SE sites faced a similar issue?