You've probably checked this, but just in case: you mention that they have the same versions of Archive::ZIP, but what about Compress::Zlib upon which the former relies? Revision notes I've found mention a nasty output truncation problem in versions prior to 1.06 of Compress::Zlib.

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I'd like to be able to assign to an luser

In reply to Re: Archive::Zip truncating data by Albannach
in thread Archive::Zip truncating data by Ovid

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