pbcopy does not seem to work within a gnu screen window in OSX

On my OS X Leopard Macbook Pro, I try to pipe text or redirect a text file into pbcopy. It works when I do th开发者_运维知识库is in the Terminal, but not if I do it in the Terminal when I'm working in a Gnu screen window.

Is this a bug or is there a workaround?

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Known bug. It may be fixed in Snow Leopard.