As you say, it works with "#lang algol60", but I can't find "Algol60" in the 
language selection dialog on DrRacket 6.9.0.1, only R5RS, "Pretty big Scheme" 
and "ProfessorJ" (which I installed manually).

Which version are you using? Which version were you using when it used to 
work?This may help others diagnose your issue.

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