I've tried downloading several times, and am unable to get it to extract:

[]  End-of-central-directory signature not found.  
Either this file is not  a zipfile, or it constitutes one disk of a multi-part archive.  
In the  latter case the central directory and zipfile comment will be found on  the last disk(s) of this archive.

unzip:  cannot find zipfile directory in one of or, and cannot find, period.
I've also tried the 5.0.1 and 5.0.2 unsuccessfully as well. I've tried extracting on both Red Hat and OS X. Any ideas? Is there a mirror for this I can try?