The @_ feature was removed in Perl 5.12, but was mistakenly omitted from the perl5120delta perldoc page. There's an errata towards the end of perl5140delta.
This Perl upgrade added three strokes to youreverybody's golf handicap, but in fairness the say feature from Perl 5.10 greatly improved our golfing experience, so we shouldn't be too upset.
update: didn't mean to imply that BrowserUk in particular was upset by this change.
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'
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