RoR works with lighttpd, not Apache

Hello,

After a recent system rebuild, I am now reinstalling Ruby on Rails on
Mac OS X. I have gotten it working, sort of, and can’t understand what’s
wrong.

If I load script/server, I’m told that it found lighttpd and is using
that. I load localhost:3000 and I see the Welcome Aboard screen and the
link “About your application’s environment”. And the link works - if I
click it, I see info about versions of Ruby, Rails, etc.

If I don’t load script/server and instead use Apache configurations,
something I had working once upon a time, I also see the Welcome Aboard
screen, but the “About your application’s environment” link doesn’t
work. I get a generic error message. And the logs are empty.

Help?