Wp one-click upgrade question

apps

#1

My brother has a web log at http://blog.njhockey.org/, which points to the same directory as http://njhockey.org/blog/ (/home/username/njhockey.org/blog). Since upgrading with the one-click install, the index page of /blog/ now returns a “Not Found, Error 404” message from wordpress. The categories and stuff show up, and the links there (to the blog.njhockey site) work. But something like:
http://njhockey.org/blog/category/analysis/
or:
http://njhockey.org/blog/2006/02/23/looking-at-the-brackets/
returns:
“No input file specified.”

The .htaccess junk is the same for both (as they’re both in the same directory), and everything worked before the upgrade. Can anyone think of an obvious solution?