pg-9.1 for fedora 15 available?

I tried to use yum to install postgresql-9.1 on my Fedora 15 box
by installing the yum conf file:
  rpm -ivh http://yum.pgrpms.org/reporpms/9.1/pgdg-fedora-9.1-3.noarch.rpm

That was fine but when I then try to install postgresql, I get:
  http://yum.postgresql.org/9.1/fedora/fedora-15-i386/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found

And indeed, in http://yum.postgresql.org/9.1/fedora/, the only f15
directory I see is fedora-15-x86_64/.

Am I doing something wrong, or is f15 32-bit not supported, or is
something borked on the site, or...?