Redirect_to weirdness?

In my rails app I issue a redirect_to
http://www.otherdomain.com/getinfo.php” to invoke a php script that
will in turn ultimately send control back to my rails app with some
information.

However I am noticing that getinfo.php seems to be cached or something.
It returns the same stale result time and again unless I manuall tell my
browser to refresh the page and enter it manually. Is this perhaps
related to the way rails is requesting that page? If so can I “fix” the
behavior to cause the php code to execute everytime?

BWT we are running mongrel_rails but I dodn’t think it should matter.