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If you haven't already done so, make sure you have 0.96j, which is
updated for Jaguar. That shouldn't affect installation, but it would affect
whether it works after you've installed. Beyond that, make sure you
aren't out of disk space. Usually this sort of thing means that the
package tarball got truncated somehow. Try downloading a new copy
and see if that helps. If not, email me and I'll try to help you figure out
what's wrong.