[Zope] 2.3.0 Solaris build corrupted?

Hi everybody, I downloaded the 2.3.0 solaris build. Gunzip goes well. It gives me a checksum error while untarring. Then, I managed to start (tar xvif ignores checksums) it but there isn't at least the HTTPCacheManager product. I've got exactly the same error with 2.3.1b1 solaris tgz. Please could you have a look and tell me?

Michele