No problems extracting the file using Winzip 12.5
Windows 7 won't extract it - gets an error. But worked OK with previous versions, including 11i.
The (unhelpful) error is:
Error 0x80004005: Unspecified Error.
Note: Because of the way things are handled, you can't get 11i any more - the download gets you the "new" file that won't extract with some tools.
WinZip 9 won't extract it, either.