Yep WinZip v8 did the same thing to me. I have a nice (freeware) editor called PFE that showed the problem and let me simply resave the file as a UNIX format file.

(list 6284, Mk1 S/N 00299 4GB blue [for sale]. Mk2 S/N 080000094 26GB blue)
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(list 6284, Mk1 S/N 00299 4GB blue [sold]. Mk2 S/N 080000094 20GB blue)