PHP 5.3: Is the use of {} to access string offsets deprecated?

The migration guide states that "The use of {} to access string offsets is deprecated. Use [] instead." but the code in zend_compile.c is commented out with #ifdef ilia_0. What's the take on this? Will it be deprecated later or should that part be removed from the migration document? Another side-note: The paragraph "The behaviour of functions with by-reference parameters called by value has changed. Where previously the function would accept the by-value argument, a warning is now emitted and all by-ref parameters are set to NULL" was confusing for a couple of people here and to be honest I'm not sure either what it means ;-) Regards, - Chris