Backwards Compatibility breaks galore

Who has been affected by this, and which thing?

We try not to break BC at all, but we're still human

PHP crashes all the time

Could just as well been something else... like bad code (infinite recursion)

And where is the backtrace/bug report?

But references caused problems!

Yes, they did – and this was fixed

It wasn't fixed correctly, as it started throwing notices

Only if you abused references before

Why does PHP memory leak?